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      "height": "1.0217",
      "label": "\"patients | topic models\"",
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      "shape": "egg",
      "size": "10.0",
      "style": "bold",
      "width": "9.3291"
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    {
      "_gvid": 84,
      "name": "branch[0,2,1,10,86,192,194,54]",
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      "fontsize": "40",
      "height": "1.0217",
      "label": "\"sentiment analysis | sentiment classification\"",
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      "shape": "egg",
      "size": "3.0",
      "style": "bold",
      "width": "17.278"
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    {
      "_gvid": 85,
      "name": "branch[0,2,1,10,86,192,194,50]",
      "age": "9.0",
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      "branchId": "0 2 1 10 86 192 194 50",
      "branch_x": "423.0000000000019",
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      "fontname": "Arial",
      "fontsize": "40",
      "height": "1.0217",
      "label": "\"social media | sentiment analysis\"",
      "nodeType": "branch",
      "pos": "59527,34724",
      "shape": "egg",
      "size": "8.0",
      "style": "bold",
      "width": "13.283"
    },
    {
      "_gvid": 86,
      "name": "branch[0,2,1,10,86,192,194,44]",
      "age": "6.0",
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      "birth": "2013.0",
      "branchId": "0 2 1 10 86 192 194 44",
      "branch_x": "428.6000000000018",
      "branch_y": "0.6",
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      "fontsize": "40",
      "height": "1.0217",
      "label": "\"active learning | experimental group\"",
      "nodeType": "branch",
      "pos": "62920,34724",
      "shape": "egg",
      "size": "4.0",
      "style": "bold",
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      "shape": "box",
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      "strTo": "\"1965-04-27\"",
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      "strFrom": "\"1974-04-27\"",
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      "height": "5.0556",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1972 , 1974 ) (((1972,1974),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
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      "pos": "22565,33561",
      "role": "\"3.0\"",
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      "support": "0",
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      "strFrom": "\"1966-04-27\"",
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      "nodeType": "period",
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      "strFrom": "\"\"",
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    },
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      "fontsize": "50",
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      "shape": "box",
      "strFrom": "\"1968-04-27\"",
      "strTo": "\"1968-04-27\"",
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    },
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      "strFrom": "\"\"",
      "strTo": "\"\"",
      "to": "1969",
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    },
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      "shape": "box",
      "strFrom": "\"1970-04-27\"",
      "strTo": "\"1970-04-27\"",
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    },
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      "label": "1969 1971",
      "nodeType": "period",
      "pos": "64286,34724",
      "shape": "box",
      "strFrom": "\"1971-04-27\"",
      "strTo": "\"1971-04-27\"",
      "to": "1971",
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    },
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      "fontsize": "50",
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      "pos": "64286,34433",
      "shape": "box",
      "strFrom": "\"1972-04-27\"",
      "strTo": "\"1972-04-27\"",
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    },
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CITATION ANALYSIS ( 1970 , 1972 ) (((1970,1972),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22565,34433",
      "role": "\"0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "strTo": "\"1972-04-27\"",
      "support": "0",
      "to": "1972",
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      "fontsize": "50",
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      "pos": "64286,33997",
      "shape": "box",
      "strFrom": "\"1973-04-27\"",
      "strTo": "\"1973-04-27\"",
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      "fontname": "Arial",
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      "frequence": "\"7.917656373713312e-3\"",
      "from": "1971",
      "height": "5.0556",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1971 , 1973 ) (((1971,1973),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22565,33997",
      "role": "\"3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "strTo": "\"1973-04-27\"",
      "support": "0",
      "to": "1973",
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      "fontsize": "50",
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      "label": "1973 1975",
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      "strFrom": "\"1975-04-27\"",
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      "frequence": "\"7.917656373713312e-3\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1973 , 1975 ) (((1973,1975),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22565,33125",
      "role": "\"3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "strTo": "\"1975-04-27\"",
      "support": "0",
      "to": "1975",
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      "_gvid": 102,
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      "fontsize": "50",
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      "strFrom": "\"1976-04-27\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1974 , 1976 ) (((1974,1976),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22565,32689",
      "role": "\"3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1976-04-27\"",
      "strTo": "\"1976-04-27\"",
      "support": "0",
      "to": "1976",
      "weight": "Nothing",
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      "fontsize": "50",
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      "label": "1975 1977",
      "nodeType": "period",
      "pos": "64286,32144",
      "shape": "box",
      "strFrom": "\"1977-04-27\"",
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      "to": "1977",
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      "frequence": "\"7.917656373713312e-3 | 0.0\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">CONTROVERSY | CITATION ANALYSIS ( 1975 , 1977 ) (((1975,1977),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">controversy<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis | controversy\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22364,32144",
      "role": "\"3.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
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      "strTo": "\"1977-04-27\"",
      "support": "0",
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      "_gvid": 106,
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      "label": "1976 1978",
      "nodeType": "period",
      "pos": "64286,31748",
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      "strFrom": "\"1978-04-27\"",
      "strTo": "\"1978-04-27\"",
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      "fontsize": "50",
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      "pos": "64286,31450",
      "shape": "box",
      "strFrom": "\"1979-04-27\"",
      "strTo": "\"1979-04-27\"",
      "to": "1979",
      "width": "3.9444"
    },
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      "frequence": "\"1.623119556611229e-2\"",
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      "height": "4.125",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MAPPING ( 1977 , 1979 ) (((1977,1979),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">mapping<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping\"",
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      "penwidth": "4",
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      "role": "\"0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
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      "strTo": "\"1979-04-27\"",
      "support": "0",
      "to": "1979",
      "weight": "Nothing",
      "width": "4.125"
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      "frequence": "\"7.917656373713312e-3\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1977 , 1979 ) (((1977,1979),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22765,31450",
      "role": "\"3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1979-04-27\"",
      "strTo": "\"1979-04-27\"",
      "support": "0",
      "to": "1979",
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      "_gvid": 110,
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CO-CITATION ANALYSIS ( 1977 , 1979 ) (((1977,1979),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">co-citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "15918,31450",
      "role": "\"0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6,0.7,0.7999999999999999,0.8999999999999999,0.9999999999999999]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1979-04-27\"",
      "strTo": "\"1979-04-27\"",
      "support": "0",
      "to": "1979",
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      "label": "1978 1980",
      "nodeType": "period",
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      "strFrom": "\"1980-04-27\"",
      "strTo": "\"1980-04-27\"",
      "to": "1980",
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      "frequence": "\"7.917656373713312e-3\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1978 , 1980 ) (((1978,1980),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "22765,30990",
      "role": "\"3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
      "strFrom": "\"1980-04-27\"",
      "strTo": "\"1980-04-27\"",
      "support": "0",
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      "_gvid": 113,
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      "frequence": "\"6.1361836896278174e-3\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CO-CITATION ( 1978 , 1980 ) (((1978,1980),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">co-citation<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-citation\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "15381,30990",
      "role": "\"0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6,0.7,0.7999999999999999,0.8999999999999999,0.9999999999999999]",
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      "lbl": "\"co-citation analysis\"",
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      "lbl": "\"citation analysis\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">AUTHORS ( 1980 , 1982 ) (((1980,1982),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">authors<\/TD><\/TR><\/TABLE><\/FONT>",
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      "lbl": "\"citation analysis | evaluation\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1982 , 1984 ) (((1982,1984),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
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      "lbl": "\"co-citation analysis\"",
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      "lbl": "\"citation analysis\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">MAPPING ( 1985 , 1987 ) (((1985,1987),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">mapping<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping\"",
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      "lbl": "\"citation analysis\"",
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      "lbl": "\"co-citation analysis\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS | CITATIONS ( 1986 , 1988 ) (((1986,1988),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | citation analysis\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">CO-CITATION | MAPPING ( 1986 , 1988 ) (((1986,1988),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-citation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">mapping<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | co-citation\"",
      "nodeType": "group",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1987 , 1989 ) (((1987,1989),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
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      "from": "1987",
      "height": "4.3333",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CO-WORDS ( 1987 , 1989 ) (((1987,1989),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">co-words<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-words\"",
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      "pos": "613.65,26642",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS ( 1988 , 1990 ) (((1988,1990),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">RESEARCH FIELD | SCIENTOMETRICS ( 1989 , 1991 ) (((1989,1991),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">research field<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">scientometrics<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">network<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">co-words<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"network | scientometrics | co-words | research field\"",
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      "penwidth": "4",
      "pos": "433.65,25604",
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      "strFrom": "\"1991-01-01\"",
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      "support": "0",
      "to": "1991",
      "weight": "Nothing",
      "width": "9.625"
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      "frequence": "\"1.6429136975455123e-2 | 7.917656373713312e-3 | 1.4251781472683963e-2 | 2.47426761678541e-2 | 1.5835312747426624e-3 | 3.958828186856656e-4 | 1.1876484560569969e-2\"",
      "from": "1989",
      "height": "9.6667",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">AUTHORS | CITATION ANALYSIS ( 1989 , 1991 ) (((1989,1991),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">institutions<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">citation patterns<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">linguistics<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">bibliometrics<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | citation analysis | bibliometrics | authors | linguistics | citation patterns | institutions\"",
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      "penwidth": "4",
      "pos": "20730,25604",
      "role": "\"3.0 | 3.0 | 0.0 | 3.0 | 0.0 | 0.0 | 0.0\"",
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      "strFrom": "\"1992-01-01\"",
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      "fontname": "Arial",
      "foundation": "\"5 | 29 | 44 | 61 | 205\"",
      "frequence": "\"1.6429136975455123e-2 | 3.7608867775138235e-3 | 2.47426761678541e-2 | 5.344418052256486e-3 | 1.979414093428328e-3\"",
      "from": "1990",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CITATION DATABASES | CITATIONS ( 1990 , 1992 ) (((1990,1992),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">citation databases<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">humanities<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">ranking<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | ranking | authors | humanities | citation databases\"",
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      "pos": "22437,24863",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "shape": "box",
      "strFrom": "\"1993-01-01\"",
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      "frequence": "\"1.623119556611229e-2 | 6.1361836896278174e-3 | 1.405384006334113e-2 | 5.938242280284984e-4 | 5.938242280284984e-4 | 1.1876484560569968e-3 | 7.917656373713312e-4 | 7.917656373713312e-4\"",
      "from": "1991",
      "height": "10.875",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">HIERARCHICAL | MAPPING ( 1991 , 1993 ) (((1991,1993),2),4)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">hierarchical<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">mapping<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">co-citation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">aggregation<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">multidimensional scaling<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">cluster<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">science citation index<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">social sciences citation index<\/TD><\/TR><\/TABLE><\/FONT>",
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      "penwidth": "4",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
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      "support": "0",
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      "shape": "box",
      "strFrom": "\"1994-01-01\"",
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      "shape": "box",
      "strFrom": "\"1995-01-01\"",
      "strTo": "\"1995-12-21\"",
      "to": "1995",
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      "lbl": "\"citations | citation analysis | evaluation | library | ranking\"",
      "nodeType": "group",
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      "strFrom": "\"1995-01-01\"",
      "strTo": "\"1995-12-21\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATIONS | CITATION ANALYSIS ( 1993 , 1995 ) (((1993,1995),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometrics<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | citation analysis | bibliometrics | authors | institutions\"",
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      "frequence": "\"1.6429136975455123e-2 | 7.917656373713312e-3 | 2.47426761678541e-2 | 7.917656373713312e-4 | 1.979414093428328e-3\"",
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      "height": "10.653",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">SOCIAL SCIENCES CITATION INDEX | AUTHORS ( 1994 , 1996 ) (((1994,1996),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social sciences citation index<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation databases<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | citation analysis | authors | social sciences citation index | citation databases\"",
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      "source": "[]",
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      "support": "0",
      "to": "1996",
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      "pos": "64286,21525",
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      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"4 | 36 | 85 | 102\"",
      "frequence": "\"1.623119556611229e-2 | 3.7608867775138235e-3 | 9.303246239113142e-3 | 6.1361836896278174e-3\"",
      "from": "1995",
      "height": "8.3889",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MAPPING | COGNITION ( 1995 , 1997 ) (((1995,1997),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">mapping<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">cognition<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">concept maps<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | cognition | education | concept maps\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "45952,21525",
      "role": "\"1.0 | 0.0 | 0.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
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      "strTo": "\"1997-12-01\"",
      "support": "0",
      "to": "1997",
      "weight": "Nothing",
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    },
    {
      "_gvid": 163,
      "name": "group1995199721",
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      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"6 | 42 | 139 | 150\"",
      "frequence": "\"7.917656373713312e-3 | 4.94853523357082e-3 | 1.7814726840854954e-3 | 1.1876484560569969e-2\"",
      "from": "1995",
      "height": "10.389",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CITATION ANALYSIS | ACADEMIC PAPERS ( 1995 , 1997 ) (((1995,1997),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">academic papers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis | indicators | academic papers | institutions\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "23558,21525",
      "role": "\"3.0 | 0.0 | 0.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
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      "strTo": "\"1997-12-01\"",
      "support": "0",
      "to": "1997",
      "weight": "Nothing",
      "width": "10.389"
    },
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      "_gvid": 164,
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      "fontname": "Arial",
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      "frequence": "\"1.623119556611229e-2 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 5.938242280284984e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MEANINGFUL LEARNING | LEARNING ( 1995 , 1997 ) (((1995,1997),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">concept maps<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">mapping<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | concept maps | learning | meaningful learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "46668,21525",
      "role": "\"1.0 | 0.0 | 0.0 | 0.0\"",
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      "source": "[]",
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      "strTo": "\"1997-12-01\"",
      "support": "0",
      "to": "1997",
      "weight": "Nothing",
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    },
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      "_gvid": 165,
      "name": "period19961998",
      "fontsize": "50",
      "from": "1996",
      "height": "0.875",
      "label": "1996 1998",
      "nodeType": "period",
      "pos": "64286,20650",
      "shape": "box",
      "strFrom": "\"1998-01-01\"",
      "strTo": "\"1998-12-01\"",
      "to": "1998",
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      "fontname": "Arial",
      "foundation": "\"4 | 9 | 33 | 44 | 89 | 265\"",
      "frequence": "\"1.623119556611229e-2 | 6.1361836896278174e-3 | 2.1773555027711613e-3 | 2.47426761678541e-2 | 5.938242280284984e-4 | 1.1876484560569968e-3\"",
      "from": "1996",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">RESEARCH FRONTS | MULTIDIMENSIONAL SCALING ( 1996 , 1998 ) (((1996,1998),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">research fronts<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">multidimensional scaling<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-citation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">mapping<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information science<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">authors<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | co-citation | information science | authors | multidimensional scaling | research fronts\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "28378,20650",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1998-01-01\"",
      "strTo": "\"1998-12-01\"",
      "support": "0",
      "to": "1998",
      "weight": "Nothing",
      "width": "11.931"
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      "fontsize": "50",
      "from": "1997",
      "height": "0.875",
      "label": "1997 1999",
      "nodeType": "period",
      "pos": "64286,19758",
      "shape": "box",
      "strFrom": "\"1999-01-01\"",
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      "to": "1999",
      "width": "3.9444"
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      "fontname": "Arial",
      "foundation": "\"4 | 11 | 12 | 44 | 69\"",
      "frequence": "\"1.623119556611229e-2 | 5.542359461599319e-3 | 2.5732383214568267e-3 | 2.47426761678541e-2 | 1.7814726840854954e-3\"",
      "from": "1997",
      "height": "10.847",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MAPPING | INFORMATION RETRIEVAL ( 1997 , 1999 ) (((1997,1999),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">mapping<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">information retrieval<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">library<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | co-citation analysis | library | authors | information retrieval\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "28878,19758",
      "role": "\"3.0 | 1.0 | 1.0 | 3.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1999-01-01\"",
      "strTo": "\"1999-12-01\"",
      "support": "0",
      "to": "1999",
      "weight": "Nothing",
      "width": "10.847"
    },
    {
      "_gvid": 169,
      "name": "group1997199929",
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      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"5 | 6 | 12 | 29 | 33 | 44\"",
      "frequence": "\"1.6429136975455123e-2 | 7.917656373713312e-3 | 2.5732383214568267e-3 | 3.7608867775138235e-3 | 2.1773555027711613e-3 | 2.47426761678541e-2\"",
      "from": "1997",
      "height": "9.2361",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">CITATION ANALYSIS | LIBRARY ( 1997 , 1999 ) (((1997,1999),2),9)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">library<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information science<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citations | citation analysis | library | ranking | information science | authors\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "25903,19758",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 1.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"1999-01-01\"",
      "strTo": "\"1999-12-01\"",
      "support": "0",
      "to": "1999",
      "weight": "Nothing",
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      "_gvid": 170,
      "name": "period19982000",
      "fontsize": "50",
      "from": "1998",
      "height": "0.875",
      "label": "1998 2000",
      "nodeType": "period",
      "pos": "64286,18906",
      "shape": "box",
      "strFrom": "\"2000-01-01\"",
      "strTo": "\"2000-12-01\"",
      "to": "2000",
      "width": "3.9444"
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    {
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      "fontname": "Arial",
      "foundation": "\"69 | 97 | 127 | 361 | 363 | 454\"",
      "frequence": "\"1.7814726840854954e-3 | 8.313539192398977e-3 | 1.0688836104512971e-2 | 2.1179730799683112e-2 | 3.958828186856656e-4 | 1.979414093428328e-4\"",
      "from": "1998",
      "height": "10.806",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">INFORMATION VISUALIZATION | SEARCH ENGINES ( 1998 , 2000 ) (((1998,2000),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">information visualization<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">search engines<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">visualization<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">user<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information retrieval<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">web<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"information retrieval | user | visualization | web | search engines | information visualization\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "29376,18906",
      "role": "\"1.0 | 0.0 | 1.0 | 0.0 | 0.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2000-01-01\"",
      "strTo": "\"2000-12-01\"",
      "support": "0",
      "to": "2000",
      "weight": "Nothing",
      "width": "10.806"
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      "_gvid": 172,
      "name": "group1998200026",
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      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"4 | 9 | 45 | 69 | 97 | 127 | 361\"",
      "frequence": "\"1.623119556611229e-2 | 6.1361836896278174e-3 | 4.750593824227987e-3 | 1.7814726840854954e-3 | 8.313539192398977e-3 | 1.0688836104512971e-2 | 2.1179730799683112e-2\"",
      "from": "1998",
      "height": "8.8056",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MAPPING | VISUALIZATION ( 1998 , 2000 ) (((1998,2000),2),6)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">mapping<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">visualization<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-citation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">web<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">intellectual structure<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information retrieval<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">user<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"mapping | co-citation | intellectual structure | information retrieval | user | visualization | web\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "30154,18906",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 1.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2000-01-01\"",
      "strTo": "\"2000-12-01\"",
      "support": "0",
      "to": "2000",
      "weight": "Nothing",
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      "name": "period19992001",
      "fontsize": "50",
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      "label": "1999 2001",
      "nodeType": "period",
      "pos": "64286,18038",
      "shape": "box",
      "strFrom": "\"2001-01-01\"",
      "strTo": "\"2001-12-15\"",
      "to": "2001",
      "width": "3.9444"
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      "_gvid": 174,
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      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"9 | 44 | 89 | 277 | 357\"",
      "frequence": "\"6.1361836896278174e-3 | 2.47426761678541e-2 | 5.938242280284984e-4 | 1.979414093428328e-3 | 5.938242280284984e-4\"",
      "from": "1999",
      "height": "11.014",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">MULTIDIMENSIONAL SCALING | CLUSTER ANALYSIS ( 1999 , 2001 ) (((1999,2001),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">multidimensional scaling<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">cluster analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">authors<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">co-citation<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">author co-citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-citation | authors | multidimensional scaling | cluster analysis | author co-citation analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "27804,18038",
      "role": "\"3.0 | 3.0 | 3.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">E-LEARNING | LEARNERS ( 2005 , 2007 ) (((2005,2007),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">e-learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | learners | e-learning\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">UNSUPERVISED LEARNING | LDA ( 2005 , 2007 ) (((2005,2007),2),9)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">unsupervised learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">learning<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">hierarchical<\/TD><\/TR><\/TABLE><\/FONT>",
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      "lbl": "\"topics | latent semantic analysis | latent dirichlet allocation | lda | lda model\"",
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      "frequence": "\"3.503562945368141e-2 | 9.699129057798808e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 7.917656373713312e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TOPIC DISTRIBUTION | LDA ( 2005 , 2007 ) (((2005,2007),2),16)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">topic distribution<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topics<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">learning<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"topics | learning | latent dirichlet allocation | lda | topic distribution\"",
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      "frequence": "\"6.1361836896278174e-3 | 9.699129057798808e-3 | 4.94853523357082e-3 | 2.3752969121139935e-3 | 9.89707046714164e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CONCEPT MAPS | LEARNING PROCESS ( 2006 , 2008 ) (((2006,2008),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">learning process<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">recommendations<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"concept maps | learning | recommendations | learners | learning process\"",
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      "frequence": "\"6.9279493269991475e-3 | 3.7608867775138235e-3 | 8.313539192398977e-3 | 2.1179730799683112e-2 | 3.958828186856656e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">SEARCH ENGINES | EVALUATION ( 2006 , 2008 ) (((2006,2008),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">search engines<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">evaluation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">web<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">user<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD><\/TR><\/TABLE><\/FONT>",
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      "frequence": "\"7.917656373713312e-3 | 3.7608867775138235e-3 | 7.917656373713312e-4 | 5.938242280284984e-4 | 1.979414093428328e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">CITATION ANALYSIS | JOURNAL IMPACT FACTOR ( 2006 , 2008 ) (((2006,2008),2),10)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">journal impact factor<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">impact factors<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">self-citations<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis | ranking | self-citations | impact factors | journal impact factor\"",
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      "frequence": "\"6.9279493269991475e-3 | 6.1361836896278174e-3 | 1.7814726840854954e-3 | 2.1179730799683112e-2 | 1.6627078384797954e-2 | 1.1084718923198638e-2\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LDA | LATENT DIRICHLET ALLOCATION ( 2006 , 2008 ) (((2006,2008),2),15)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">evaluation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information retrieval<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classification<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">web<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"evaluation | classification | information retrieval | web | latent dirichlet allocation | lda\"",
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      "frequence": "\"3.167062549485325e-3 | 3.7608867775138235e-3 | 1.4251781472683963e-2 | 4.94853523357082e-3 | 1.979414093428328e-3 | 1.979414093428328e-3 | 2.1179730799683112e-2 | 5.938242280284984e-4\"",
      "from": "2008",
      "height": "9.6944",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">INDICATORS | H-INDEX ( 2008 , 2010 ) (((2008,2010),2),27)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">h-index<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">bibliometric indices<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometrics<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation databases<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">web<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">case study<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"case study | ranking | bibliometrics | indicators | bibliometric indices | citation databases | web | h-index\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "26549,10242",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
      "strFrom": "\"2010-01-01\"",
      "strTo": "\"2010-12-15\"",
      "support": "0",
      "to": "2010",
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    },
    {
      "_gvid": 234,
      "name": "period20092011",
      "fontsize": "50",
      "from": "2009",
      "height": "0.875",
      "label": "2009 2011",
      "nodeType": "period",
      "pos": "64286,9368.5",
      "shape": "box",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "to": "2011",
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    },
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      "frequence": "\"3.7608867775138235e-3 | 4.94853523357082e-3 | 3.958828186856656e-4 | 1.1876484560569969e-2 | 2.1179730799683112e-2\"",
      "from": "2009",
      "height": "8.4306",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">CITATION IMPACT | RANKING ( 2009 , 2011 ) (((2009,2011),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">citation impact<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">web<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"ranking | indicators | citation impact | institutions | web\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "24481,9368.5",
      "role": "\"3.0 | 3.0 | 1.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
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    },
    {
      "_gvid": 236,
      "name": "group2009201127",
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      "fontname": "Arial",
      "foundation": "\"85 | 102 | 185 | 433 | 521\"",
      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 1.1876484560569968e-3 | 1.979414093428328e-4\"",
      "from": "2009",
      "height": "10.069",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">E-LEARNING | CONCEPT MAPS ( 2009 , 2011 ) (((2009,2011),2),7)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">e-learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">information technology<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | information technology | e-learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "49074,9368.5",
      "role": "\"3.0 | 3.0 | 3.0 | 0.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "10.069"
    },
    {
      "_gvid": 237,
      "name": "group2009201128",
      "bId": "26",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"542 | 574 | 575 | 649 | 671\"",
      "frequence": "\"1.6627078384797954e-2 | 1.1084718923198638e-2 | 7.917656373713312e-4 | 1.1876484560569968e-3 | 2.3752969121139935e-3\"",
      "from": "2009",
      "height": "9.6389",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2009 , 2011 ) (((2009,2011),2),8)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda model<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">probabilistic model<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent topic<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"latent dirichlet allocation | lda | probabilistic model | lda model | latent topic\"",
      "nodeType": "group",
      "penwidth": "4",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
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    },
    {
      "_gvid": 238,
      "name": "group20092011213",
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      "fontname": "Arial",
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      "frequence": "\"1.979414093428328e-4 | 1.3855898653998297e-3 | 6.1361836896278174e-3 | 3.958828186856656e-4 | 9.89707046714164e-4\"",
      "from": "2009",
      "height": "11.653",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">PATENTS | TECHNOLOGICAL INNOVATION ( 2009 , 2011 ) (((2009,2011),2),13)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patents<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">technological innovation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patent data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patent citations<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">industry<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"patent citations | patents | industry | patent data | technological innovation\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "34030,9368.5",
      "role": "\"1.0 | 1.0 | 0.0 | 1.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
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      "support": "0",
      "to": "2011",
      "weight": "Nothing",
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    },
    {
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      "name": "group20092011219",
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      "fontname": "Arial",
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      "frequence": "\"4.94853523357082e-3 | 1.979414093428328e-4 | 1.761678543151212e-2 | 1.3855898653998297e-3 | 6.1361836896278174e-3 | 3.958828186856656e-4\"",
      "from": "2009",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">PATENT ANALYSIS | PATENTS ( 2009 , 2011 ) (((2009,2011),2),19)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">patent analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patents<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patent citations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">industry<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">trends<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">indicators<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"indicators | patent citations | trends | patents | industry | patent analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "34845,9368.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "8.9722"
    },
    {
      "_gvid": 240,
      "name": "group20092011221",
      "bId": "27",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"97 | 257 | 361 | 542 | 574 | 597\"",
      "frequence": "\"8.313539192398977e-3 | 4.94853523357082e-3 | 2.1179730799683112e-2 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2\"",
      "from": "2009",
      "height": "8.8611",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2009 , 2011 ) (((2009,2011),2),21)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">user<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recommendations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">web<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"user | recommendations | web | latent dirichlet allocation | lda | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "57305,9368.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "8.8611"
    },
    {
      "_gvid": 241,
      "name": "group20092011224",
      "bId": "19",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"7 | 60 | 92 | 147 | 380 | 437\"",
      "frequence": "\"3.167062549485325e-3 | 1.761678543151212e-2 | 1.4845605700712462e-2 | 1.3855898653998297e-3 | 3.3650039588281576e-3 | 9.89707046714164e-4\"",
      "from": "2009",
      "height": "10.25",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TECHNOLOGICAL INNOVATION | PATENTS ( 2009 , 2011 ) (((2009,2011),2),24)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">technological innovation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patents<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">trends<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">network analysis<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">keywords<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">case study<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"case study | trends | keywords | patents | network analysis | technological innovation\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "35609,9368.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "10.25"
    },
    {
      "_gvid": 242,
      "name": "group20092011226",
      "bId": "23",
      "branchId": "0 2 1 10 86 192 145",
      "fontname": "Arial",
      "foundation": "\"199 | 244 | 542 | 574 | 597 | 725\"",
      "frequence": "\"1.7814726840854954e-3 | 3.5629453681709907e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2 | 3.958828186856656e-4\"",
      "from": "2009",
      "height": "9.8333",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2009 , 2011 ) (((2009,2011),2),26)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">training data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recognition<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">labeling<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"recognition | labeling | latent dirichlet allocation | lda | topic models | training data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "43231,9368.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "9.8333"
    },
    {
      "_gvid": 243,
      "name": "group20092011229",
      "bId": "13",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"2 | 8 | 29 | 42 | 170 | 176 | 205\"",
      "frequence": "\"2.5732383214568267e-3 | 6.9279493269991475e-3 | 3.7608867775138235e-3 | 4.94853523357082e-3 | 1.979414093428328e-3 | 5.938242280284984e-4 | 1.979414093428328e-3\"",
      "from": "2009",
      "height": "10.125",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">INDICATORS | BIBLIOMETRIC INDICES ( 2009 , 2011 ) (((2009,2011),2),29)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometric indices<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">evaluation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">impact factors<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation databases<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">index<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"index | evaluation | ranking | indicators | bibliometric indices | impact factors | citation databases\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "26086,9368.5",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "10.125"
    },
    {
      "_gvid": 244,
      "name": "group20092011231",
      "bId": "18",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"69 | 198 | 207 | 542 | 574 | 597 | 671\"",
      "frequence": "\"1.7814726840854954e-3 | 1.979414093428328e-3 | 2.3752969121139935e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2 | 2.3752969121139935e-3\"",
      "from": "2009",
      "height": "11.042",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2009 , 2011 ) (((2009,2011),2),31)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent topic<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">information retrieval<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">representations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">representativeness<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"information retrieval | representativeness | representations | latent dirichlet allocation | lda | topic models | latent topic\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "33141,9368.5",
      "role": "\"3.0 | 1.0 | 1.0 | 3.0 | 3.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2011-01-01\"",
      "strTo": "\"2011-12-26\"",
      "support": "0",
      "to": "2011",
      "weight": "Nothing",
      "width": "11.042"
    },
    {
      "_gvid": 245,
      "name": "period20102012",
      "fontsize": "50",
      "from": "2010",
      "height": "0.875",
      "label": "2010 2012",
      "nodeType": "period",
      "pos": "64286,8457.5",
      "shape": "box",
      "strFrom": "\"2012-01-01\"",
      "strTo": "\"2012-12-19\"",
      "to": "2012",
      "width": "3.9444"
    },
    {
      "_gvid": 246,
      "name": "group2010201228",
      "bId": "1",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"27 | 54 | 55 | 309 | 327\"",
      "frequence": "\"9.89707046714164e-3 | 1.128266033254147e-2 | 3.167062549485325e-3 | 2.5732383214568267e-3 | 3.958828186856656e-4\"",
      "from": "2010",
      "height": "10.639",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">STRATEGIC DIAGRAM | NETWORK ( 2010 , 2012 ) (((2010,2012),2),8)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">strategic diagram<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">network<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social network analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">co-word analysis<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">patterns<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"patterns | network | co-word analysis | social network analysis | strategic diagram\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "2137.7,8457.5",
      "role": "\"1.0 | 3.0 | 3.0 | 1.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2012-01-01\"",
      "strTo": "\"2012-12-19\"",
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      "from": "2011",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LEARNING | CONCEPT MAPS ( 2011 , 2013 ) (((2011,2013),2),20)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">knowledge structures<\/TD><\/TR><\/TABLE><\/FONT>",
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      "frequence": "\"2.3752969121139935e-3 | 1.6627078384797954e-2 | 2.1179730799683112e-2 | 7.917656373713312e-4 | 5.740300870942151e-3\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TOPIC MODELS | LATENT DIRICHLET ALLOCATION ( 2011 , 2013 ) (((2011,2013),2),23)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">microblogs<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">social media<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">websites<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"websites | latent dirichlet allocation | topic models | microblogs | social media\"",
      "nodeType": "group",
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      "lbl": "\"semantic map | perceptions | recognition | navigation | mobile robot\"",
      "nodeType": "group",
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      "pos": "16321,7486.5",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">PATENT DATA | PATENTS ( 2011 , 2013 ) (((2011,2013),2),33)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">patent data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">patents<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">patent citations<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">industry<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classification<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"indicators | patent citations | classification | patents | industry | patent data\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TWITTER | TOPIC MODELS ( 2011 , 2013 ) (((2011,2013),2),34)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">twitter<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">hashtags<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">tweets<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">twitter data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">social media<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"latent dirichlet allocation | topic models | twitter | tweets | social media | hashtags | twitter data\"",
      "nodeType": "group",
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      "from": "2011",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">PERSONAL INFORMATION | F MEASURE ( 2011 , 2013 ) (((2011,2013),2),36)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">personal information<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">f measure<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">detection<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classifiers<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"detection | classifiers | latent dirichlet allocation | lda | f measure | personal information\"",
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      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 5.938242280284984e-4 | 9.699129057798808e-3 | 9.89707046714164e-4 | 9.89707046714164e-4\"",
      "from": "2011",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">EXPERIMENTAL GROUP | CONTROL GROUP ( 2011 , 2013 ) (((2011,2013),2),39)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">experimental group<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">control group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">suggestions<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | suggestions | learning | control group | experimental group\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">COGNITIVE LOAD | LEARNING ( 2011 , 2013 ) (((2011,2013),2),40)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">cognitive load<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning process<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | learners | learning process | cognitive load\"",
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      "from": "2011",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">LEARNING | CONCEPT MAPS ( 2011 , 2013 ) (((2011,2013),2),48)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">e-learning<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">cognition<\/TD><\/TR><\/TABLE><\/FONT>",
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      "nodeType": "group",
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      "from": "2011",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LATENT DIRICHLET ALLOCATION | TWEETS ( 2011 , 2013 ) (((2011,2013),2),49)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">tweets<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">twitter<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">sentiment analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">opinions<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"opinions | latent dirichlet allocation | lda | topic models | twitter | tweets | sentiment analysis\"",
      "nodeType": "group",
      "penwidth": "4",
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      "label": "2012 2014",
      "nodeType": "period",
      "pos": "64286,6499.5",
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      "strFrom": "\"2014-01-01\"",
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      "width": "3.9444"
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      "name": "group2012201424",
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      "frequence": "\"6.1361836896278174e-3 | 2.3752969121139935e-3 | 3.3650039588281576e-3 | 2.3752969121139935e-3 | 7.917656373713312e-4\"",
      "from": "2012",
      "height": "11.833",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">CLASSIFICATION | CLASSIFICATION ACCURACY ( 2012 , 2014 ) (((2012,2014),2),4)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">classification<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">classification accuracy<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classifiers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">representations<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent topic<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"classification | representations | classifiers | latent topic | classification accuracy\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "32641,6499.5",
      "role": "\"3.0 | 1.0 | 1.0 | 1.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "support": "0",
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      "frequence": "\"3.167062549485325e-3 | 1.761678543151212e-2 | 1.4845605700712462e-2 | 3.3650039588281576e-3 | 3.958828186856656e-4\"",
      "from": "2012",
      "height": "11.181",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">STRATEGIC DIAGRAM | RESEARCH THEMES ( 2012 , 2014 ) (((2012,2014),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">strategic diagram<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research themes<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">co-word analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">keywords<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">trends<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-word analysis | trends | keywords | research themes | strategic diagram\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "1625.7,6499.5",
      "role": "\"3.0 | 2.0 | 3.0 | 1.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
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      "support": "0",
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      "from": "2012",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TOPIC MODELS | LATENT DIRICHLET ALLOCATION ( 2012 , 2014 ) (((2012,2014),2),7)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">sensitivity<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">patients<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">genes<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"genes | patients | sensitivity | latent dirichlet allocation | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "55601,6499.5",
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      "support": "0",
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    {
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      "frequence": "\"6.1361836896278174e-3 | 3.3650039588281576e-3 | 3.958828186856656e-4 | 1.5835312747426624e-3 | 0.0\"",
      "from": "2012",
      "height": "11.375",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">TEXT CATEGORIZATION | CLASSIFICATION ( 2012 , 2014 ) (((2012,2014),2),10)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">text categorization<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classification<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">support vector machine<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classifiers<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">dimensionality<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"classification | classifiers | dimensionality | support vector machine | text categorization\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "43750,6499.5",
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    {
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      "name": "group20122014220",
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      "fontname": "Arial",
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      "frequence": "\"2.1179730799683112e-2 | 3.958828186856656e-3 | 7.917656373713312e-4 | 2.5732383214568267e-3 | 5.938242280284984e-4\"",
      "from": "2012",
      "height": "7.7639",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">HASHTAGS | TWITTER ( 2012 , 2014 ) (((2012,2014),2),20)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">microblogs<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"topic models | twitter | microblogs | tweets | hashtags\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "58790,6499.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "support": "0",
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    {
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      "frequence": "\"5.542359461599319e-3 | 9.89707046714164e-4 | 2.1179730799683112e-2 | 3.167062549485325e-3 | 1.979414093428328e-4\"",
      "from": "2012",
      "height": "8.5139",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LCA | SCIENCE DATABASE ( 2012 , 2014 ) (((2012,2014),2),27)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">lca<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">science database<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">web<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">life cycle<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-citation analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-citation analysis | life cycle | web | science database | lca\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "4756.7,6499.5",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
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      "strTo": "\"2014-12-31\"",
      "support": "0",
      "to": "2014",
      "weight": "Nothing",
      "width": "8.5139"
    },
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      "fontname": "Arial",
      "foundation": "\"36 | 85 | 102 | 185 | 209 | 266\"",
      "frequence": "\"3.7608867775138235e-3 | 9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 5.938242280284984e-4\"",
      "from": "2012",
      "height": "10.125",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">MEANINGFUL LEARNING | CONCEPT MAPS ( 2012 , 2014 ) (((2012,2014),2),29)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">cognition<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"cognition | education | concept maps | learning | teachers | meaningful learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "47056,6499.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
      "strFrom": "\"2014-01-01\"",
      "strTo": "\"2014-12-31\"",
      "support": "0",
      "to": "2014",
      "weight": "Nothing",
      "width": "10.125"
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    {
      "_gvid": 278,
      "name": "group20122014232",
      "bId": "26",
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      "fontname": "Arial",
      "foundation": "\"363 | 426 | 447 | 542 | 574 | 597\"",
      "frequence": "\"3.958828186856656e-4 | 6.532066508313482e-3 | 2.3752969121139935e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2\"",
      "from": "2012",
      "height": "10.181",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2012 , 2014 ) (((2012,2014),2),32)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">websites<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text mining<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">search engines<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"search engines | text mining | websites | latent dirichlet allocation | lda | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "54745,6499.5",
      "role": "\"1.0 | 1.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2014-01-01\"",
      "strTo": "\"2014-12-31\"",
      "support": "0",
      "to": "2014",
      "weight": "Nothing",
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    },
    {
      "_gvid": 279,
      "name": "group20122014233",
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      "branchId": "0 2 1 10 86 192 185",
      "fontname": "Arial",
      "foundation": "\"241 | 542 | 574 | 597 | 692 | 729\"",
      "frequence": "\"3.958828186856656e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2 | 3.958828186856656e-4 | 5.938242280284984e-4\"",
      "from": "2012",
      "height": "10.625",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LATENT DIRICHLET ALLOCATION | SHORT TEXTS ( 2012 , 2014 ) (((2012,2014),2),33)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">short texts<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">sparsity<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">word co-occurrence<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"word co-occurrence | latent dirichlet allocation | lda | topic models | sparsity | short texts\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "45409,6499.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
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      "strTo": "\"2014-12-31\"",
      "support": "0",
      "to": "2014",
      "weight": "Nothing",
      "width": "10.625"
    },
    {
      "_gvid": 280,
      "name": "group20122014236",
      "bId": "26",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"256 | 426 | 504 | 542 | 574 | 597\"",
      "frequence": "\"3.958828186856656e-4 | 6.532066508313482e-3 | 7.917656373713312e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2\"",
      "from": "2012",
      "height": "11.347",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">GENE EXPRESSION | LATENT DIRICHLET ALLOCATION ( 2012 , 2014 ) (((2012,2014),2),36)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">gene expression<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">genes<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text mining<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"genes | text mining | gene expression | latent dirichlet allocation | lda | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "53898,6499.5",
      "role": "\"1.0 | 1.0 | 0.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
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      "support": "0",
      "to": "2014",
      "weight": "Nothing",
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    },
    {
      "_gvid": 281,
      "name": "group20122014238",
      "bId": "25",
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      "fontname": "Arial",
      "foundation": "\"71 | 83 | 85 | 102 | 185 | 388 | 521\"",
      "frequence": "\"1.3855898653998297e-3 | 2.3752969121139935e-3 | 9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 2.3752969121139935e-3 | 1.979414093428328e-4\"",
      "from": "2012",
      "height": "8.4583",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">E-LEARNING | LEARNERS ( 2012 , 2014 ) (((2012,2014),2),38)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">e-learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">experts<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">graphs<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"graphs | experts | education | concept maps | learning | learners | e-learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "47797,6499.5",
      "role": "\"1.0 | 1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
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      "support": "0",
      "to": "2014",
      "weight": "Nothing",
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    },
    {
      "_gvid": 282,
      "name": "group20122014239",
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      "fontname": "Arial",
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      "frequence": "\"9.89707046714164e-4 | 2.1179730799683112e-2 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 2.7711797307996594e-3 | 5.938242280284984e-4\"",
      "from": "2012",
      "height": "9.4028",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TWITTER DATA | TOPIC MODELS ( 2012 , 2014 ) (((2012,2014),2),39)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">real time<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"real time | topic models | twitter | tweets | social media | sentiment analysis | twitter data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "60187,6499.5",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "support": "0",
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      "weight": "Nothing",
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    },
    {
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      "frequence": "\"1.7814726840854954e-3 | 1.979414093428328e-4 | 3.3650039588281576e-3 | 5.938242280284984e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 2.1179730799683112e-2\"",
      "from": "2012",
      "height": "10.028",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LATENT DIRICHLET ALLOCATION | LDA ( 2012 , 2014 ) (((2012,2014),2),42)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">recognition<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classifiers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">descriptors<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">k-means<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"recognition | descriptors | classifiers | k-means | latent dirichlet allocation | lda | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "44593,6499.5",
      "role": "\"3.0 | 0.0 | 1.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "support": "0",
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      "weight": "Nothing",
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    },
    {
      "_gvid": 284,
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      "fontname": "Arial",
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      "frequence": "\"1.979414093428328e-3 | 2.3752969121139935e-3 | 2.1179730799683112e-2 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 5.938242280284984e-4\"",
      "from": "2012",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">SOCIAL MEDIA PLATFORMS | TWITTER ( 2012 , 2014 ) (((2012,2014),2),43)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">social media platforms<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">opinions<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">coverage<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"coverage | opinions | topic models | twitter | tweets | social media | social media platforms\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "61365,6499.5",
      "role": "\"2.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "support": "0",
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      "weight": "Nothing",
      "width": "9.6806"
    },
    {
      "_gvid": 285,
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      "fontname": "Arial",
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      "frequence": "\"2.3752969121139935e-3 | 7.917656373713312e-4 | 4.94853523357082e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 9.89707046714164e-4 | 2.1179730799683112e-2 | 7.917656373713312e-4 | 7.917656373713312e-4\"",
      "from": "2012",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2012 , 2014 ) (((2012,2014),2),46)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic distribution<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">real-world dataset<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">recommendation systems<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">recommendations<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">representations<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">hierarchical<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"representations | hierarchical | recommendations | latent dirichlet allocation | lda | recommendation systems | topic models | real-world dataset | topic distribution\"",
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      "lbl": "\"education | learning | teachers | mind maps | active learning\"",
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      "lbl": "\"representativeness | labeling | latent dirichlet allocation | deep learning | convolutional neural network\"",
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      "lbl": "\"classifiers | automatic classification | machine learning | latent dirichlet allocation | lda\"",
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      "lbl": "\"opinions | learning | mind maps | control group | experimental group\"",
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      "lbl": "\"bibliometric analysis | representativeness | web | citespace | visualization analysis\"",
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      "frequence": "\"3.7608867775138235e-3 | 4.94853523357082e-3 | 3.958828186856656e-4 | 1.979414093428328e-4 | 5.938242280284984e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">INDICATORS | RANKING ( 2013 , 2015 ) (((2013,2015),2),15)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ranking<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">citation impact<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">h-index<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">journal impact factor<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"ranking | indicators | citation impact | journal impact factor | h-index\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">COMPUTER VISION | HUMANITIES ( 2013 , 2015 ) (((2013,2015),2),18)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">computer vision<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">humanities<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">recognition<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">labeling<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">semantic map<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"humanities | semantic map | recognition | labeling | computer vision\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">INSTITUTIONS | SCIENTIFIC OUTPUT ( 2013 , 2015 ) (((2013,2015),2),19)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">scientific output<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">developed countries<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD><\/TR><\/TABLE><\/FONT>",
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      "from": "2013",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LDA | LATENT DIRICHLET ALLOCATION ( 2013 , 2015 ) (((2013,2015),2),22)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">interpretability<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">metadata<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">digital libraries<\/TD><\/TR><\/TABLE><\/FONT>",
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      "frequence": "\"5.344418052256486e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 0.0 | 3.958828186856656e-4\"",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LATENT DIRICHLET ALLOCATION | LDA ( 2013 , 2015 ) (((2013,2015),2),23)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">classification tasks<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">training data<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">machine learning<\/TD><\/TR><\/TABLE><\/FONT>",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LIBRARY | CITATION ANALYSIS ( 2013 , 2015 ) (((2013,2015),2),24)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">library<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">librarians<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">core journals<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">journal citation report<\/TD><\/TR><\/TABLE><\/FONT>",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">INDICATORS | IMPACT FACTORS ( 2013 , 2015 ) (((2013,2015),2),25)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">impact factors<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">journal impact factor<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">h-index<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometric indices<\/TD><\/TR><\/TABLE><\/FONT>",
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      "frequence": "\"4.94853523357082e-3 | 3.958828186856656e-4 | 6.532066508313482e-3 | 1.3855898653998297e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2\"",
      "from": "2013",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LDA | LATENT DIRICHLET ALLOCATION ( 2013 , 2015 ) (((2013,2015),2),42)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recommendations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">contextual information<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text mining<\/TD><\/TR><\/TABLE><\/FONT>",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">TWITTER | TWEETS ( 2013 , 2015 ) (((2013,2015),2),45)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD><\/TR><\/TABLE><\/FONT>",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LEARNING | EDUCATION ( 2013 , 2015 ) (((2013,2015),2),46)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">teachers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">learning process<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">higher education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">mind maps<\/TD><\/TR><\/TABLE><\/FONT>",
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      "source": "[]",
      "strFrom": "\"2015-01-01\"",
      "strTo": "\"2015-12-15\"",
      "support": "0",
      "to": "2015",
      "weight": "Nothing",
      "width": "11.569"
    },
    {
      "_gvid": 312,
      "name": "group20132015255",
      "bId": "6",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"92 | 162 | 314 | 317 | 449 | 677 | 721\"",
      "frequence": "\"1.4845605700712462e-2 | 1.7814726840854954e-3 | 1.979414093428328e-4 | 3.7608867775138235e-3 | 3.958828186856656e-4 | 7.917656373713312e-4 | 1.979414093428328e-3\"",
      "from": "2013",
      "height": "12.264",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">KEYWORDS | ENVIRONMENTAL SCIENCES ( 2013 , 2015 ) (((2013,2015),2),55)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">keywords<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">environmental sciences<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">ecology<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">climate change<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">hotspots<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research trends<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">subject categories<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"keywords | ecology | subject categories | research trends | environmental sciences | climate change | hotspots\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "9725.7,5543",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 0.0 | 0.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2015-01-01\"",
      "strTo": "\"2015-12-15\"",
      "support": "0",
      "to": "2015",
      "weight": "Nothing",
      "width": "12.264"
    },
    {
      "_gvid": 313,
      "name": "period20142016",
      "fontsize": "50",
      "from": "2014",
      "height": "0.875",
      "label": "2014 2016",
      "nodeType": "period",
      "pos": "64286,4531",
      "shape": "box",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "to": "2016",
      "width": "3.9444"
    },
    {
      "_gvid": 314,
      "name": "group2014201625",
      "bId": "21",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"228 | 477 | 503 | 574 | 799\"",
      "frequence": "\"1.3855898653998297e-3 | 5.344418052256486e-3 | 5.938242280284984e-4 | 1.1084718923198638e-2 | 3.5629453681709907e-3\"",
      "from": "2014",
      "height": "8.1528",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">MACHINE LEARNING | BIG DATA ( 2014 , 2016 ) (((2014,2016),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">machine learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">big data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">sensitivity<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">parallelism<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"parallelism | machine learning | sensitivity | lda | big data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "36988,4531",
      "role": "\"2.0 | 3.0 | 2.0 | 3.0 | 0.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "8.1528"
    },
    {
      "_gvid": 315,
      "name": "group2014201626",
      "bId": "6",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"141 | 317 | 361 | 417 | 721\"",
      "frequence": "\"3.3650039588281576e-3 | 3.7608867775138235e-3 | 2.1179730799683112e-2 | 3.7608867775138235e-3 | 1.979414093428328e-3\"",
      "from": "2014",
      "height": "7.2778",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">HOTSPOTS | WEB ( 2014 , 2016 ) (((2014,2016),2),6)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">hotspots<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">web<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">landscape<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">exploration<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">research trends<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"exploration | research trends | web | landscape | hotspots\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "9540.7,4531",
      "role": "\"1.0 | 3.0 | 1.0 | 0.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "7.2778"
    },
    {
      "_gvid": 316,
      "name": "group20142016212",
      "bId": "20",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"6 | 12 | 120 | 153 | 160\"",
      "frequence": "\"7.917656373713312e-3 | 2.5732383214568267e-3 | 1.5835312747426624e-3 | 7.917656373713312e-4 | 3.958828186856656e-4\"",
      "from": "2014",
      "height": "9.3472",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">CITATION ANALYSIS | LIBRARY ( 2014 , 2016 ) (((2014,2016),2),12)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citation analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">library<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">citation analyses<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">core journals<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">reference lists<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation analysis | library | core journals | citation analyses | reference lists\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "36007,4531",
      "role": "\"3.0 | 3.0 | 2.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "9.3472"
    },
    {
      "_gvid": 317,
      "name": "group20142016213",
      "bId": "26",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"240 | 496 | 542 | 574 | 624\"",
      "frequence": "\"7.917656373713312e-4 | 7.917656373713312e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 7.917656373713312e-4\"",
      "from": "2014",
      "height": "10.181",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | LDA ( 2014 , 2016 ) (((2014,2016),2),13)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">unsupervised learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hierarchical<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text documents<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"hierarchical | text documents | latent dirichlet allocation | lda | unsupervised learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "51751,4531",
      "role": "\"3.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "10.181"
    },
    {
      "_gvid": 318,
      "name": "group20142016214",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"747 | 759 | 761 | 785 | 807\"",
      "frequence": "\"0.0 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 2.7711797307996594e-3 | 5.938242280284984e-4\"",
      "from": "2014",
      "height": "8.5833",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">TWITTER DATA | TWITTER ( 2014 , 2016 ) (((2014,2016),2),14)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">api<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"api | twitter | tweets | sentiment analysis | twitter data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "59597,4531",
      "role": "\"0.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "8.5833"
    },
    {
      "_gvid": 319,
      "name": "group20142016216",
      "bId": "21",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"257 | 349 | 496 | 577 | 597\"",
      "frequence": "\"4.94853523357082e-3 | 3.958828186856656e-4 | 7.917656373713312e-4 | 9.89707046714164e-4 | 2.1179730799683112e-2\"",
      "from": "2014",
      "height": "13.639",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">RECOMMENDATIONS | RECOMMENDATION SYSTEMS ( 2014 , 2016 ) (((2014,2016),2),16)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">recommendations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recommendation systems<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">contextual information<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">topic models<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text documents<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"recommendations | contextual information | text documents | recommendation systems | topic models\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "39154,4531",
      "role": "\"3.0 | 2.0 | 1.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "13.639"
    },
    {
      "_gvid": 320,
      "name": "group20142016217",
      "bId": "25",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"185 | 388 | 431 | 459 | 657\"",
      "frequence": "\"9.699129057798808e-3 | 2.3752969121139935e-3 | 9.89707046714164e-4 | 0.0 | 9.89707046714164e-4\"",
      "from": "2014",
      "height": "10.292",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LEARNING | CONTROL GROUP ( 2014 , 2016 ) (((2014,2016),2),17)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">control group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">experimental group<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">cognitive load<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"learning | learners | control group | cognitive load | experimental group\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "49792,4531",
      "role": "\"3.0 | 3.0 | 3.0 | 2.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "10.292"
    },
    {
      "_gvid": 321,
      "name": "group20142016226",
      "bId": "21",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"208 | 426 | 497 | 542 | 574\"",
      "frequence": "\"1.979414093428328e-4 | 6.532066508313482e-3 | 1.3855898653998297e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2\"",
      "from": "2014",
      "height": "10.764",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">LDA | LATENT DIRICHLET ALLOCATION ( 2014 , 2016 ) (((2014,2016),2),26)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">text mining<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">text data<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">vocabulary<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"vocabulary | text mining | text data | latent dirichlet allocation | lda\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "38204,4531",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "10.764"
    },
    {
      "_gvid": 322,
      "name": "group20142016232",
      "bId": "4",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"345 | 424 | 542 | 574 | 646\"",
      "frequence": "\"3.958828186856656e-4 | 5.938242280284984e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 9.89707046714164e-4\"",
      "from": "2014",
      "height": "13",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">DIMENSIONALITY REDUCTION | LATENT DIRICHLET ALLOCATION ( 2014 , 2016 ) (((2014,2016),2),32)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">dimensionality reduction<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">dimensionality<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">textual data<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"dimensionality | textual data | latent dirichlet allocation | lda | dimensionality reduction\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "6996.7,4531",
      "role": "\"3.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "13"
    },
    {
      "_gvid": 323,
      "name": "group20142016233",
      "bId": "4",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"69 | 480 | 496 | 523 | 770\"",
      "frequence": "\"1.7814726840854954e-3 | 1.1876484560569968e-3 | 7.917656373713312e-4 | 1.979414093428328e-4 | 5.740300870942151e-3\"",
      "from": "2014",
      "height": "12.736",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">NLP | NATURAL LANGUAGE PROCESSING ( 2014 , 2016 ) (((2014,2016),2),33)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">nlp<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">natural language processing<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">information retrieval<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">text documents<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social media<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"information retrieval | natural language processing | text documents | nlp | social media\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "5997.7,4531",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "12.736"
    },
    {
      "_gvid": 324,
      "name": "group20142016236",
      "bId": "5",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"68 | 103 | 277 | 317 | 663\"",
      "frequence": "\"1.7814726840854954e-3 | 3.167062549485325e-3 | 1.979414093428328e-3 | 3.7608867775138235e-3 | 1.3855898653998297e-3\"",
      "from": "2014",
      "height": "10.847",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">SUPPLY CHAIN MANAGEMENT | CO-WORDS ( 2014 , 2016 ) (((2014,2016),2),36)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">supply chain management<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">co-words<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research field<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research trends<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">cluster analysis<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"co-words | research field | cluster analysis | research trends | supply chain management\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "8815.7,4531",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2016-01-01\"",
      "strTo": "\"2016-12-16\"",
      "support": "0",
      "to": "2016",
      "weight": "Nothing",
      "width": "10.847"
    },
    {
      "_gvid": 325,
      "name": "group20142016237",
      "bId": "13",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"35 | 42 | 170 | 230 | 703\"",
      "frequence": "\"1.4251781472683963e-2 | 4.94853523357082e-3 | 1.979414093428328e-3 | 1.979414093428328e-4 | 5.938242280284984e-4\"",
      "from": "2014",
      "height": "10.736",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">INDICATORS | BIBLIOMETRICS ( 2014 , 2016 ) (((2014,2016),2),37)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">indicators<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometrics<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">bibliometric indices<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">journal impact factor<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">h-index<\/TD><\/TR><\/TABLE><\/FONT>",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">LATENT DIRICHLET ALLOCATION | LDA ( 2014 , 2016 ) (((2014,2016),2),47)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">support vector machine<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">training data<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">classifiers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">labeling<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">k-means<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">dimensionality<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"labeling | classifiers | dimensionality | k-means | latent dirichlet allocation | lda | support vector machine | training data\"",
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      "from": "2014",
      "height": "8.75",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">SHORT TEXTS | SPARSITY ( 2014 , 2016 ) (((2014,2016),2),52)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">short texts<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sparsity<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">word co-occurrence<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">semantic relation<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"word co-occurrence | semantic relation | lda | topic models | sparsity | short texts\"",
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      "penwidth": "4",
      "pos": "45197,4531",
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      "height": "10.486",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">MOBILE ROBOT | SEMANTIC MAP ( 2014 , 2016 ) (((2014,2016),2),56)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">mobile robot<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">semantic map<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">semantic information<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">navigation<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">exploration<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">classifiers<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"semantic map | exploration | navigation | classifiers | semantic information | mobile robot\"",
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      "penwidth": "4",
      "pos": "16777,4531",
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      "from": "2014",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">CONCEPT MAPS | LEARNING ( 2014 , 2016 ) (((2014,2016),2),59)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">experimental group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">control group<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">history<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | history | concept maps | learning | meaningful learning | learners | control group | experimental group\"",
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      "frequence": "\"1.7814726840854954e-3 | 1.1876484560569969e-2 | 1.5835312747426625e-2 | 1.3855898653998297e-3 | 7.917656373713312e-4 | 3.3650039588281576e-3 | 5.938242280284984e-4\"",
      "from": "2014",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">INSTITUTIONS | INTERNATIONAL COLLABORATION ( 2014 , 2016 ) (((2014,2016),2),62)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">institutions<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">bibliometric analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research output<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">scopus database<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">h-index<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">academic papers<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"academic papers | institutions | bibliometric analysis | research output | international collaboration | scopus database | h-index\"",
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      "nodeType": "period",
      "pos": "64286,3493.5",
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      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 1.979414093428328e-4\"",
      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">COLLABORATIVE LEARNING | LEARNING ( 2015 , 2017 ) (((2015,2017),2),1)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">collaborative learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | teachers | collaborative learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "46582,3493.5",
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      "fontname": "Arial",
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      "frequence": "\"3.958828186856656e-4 | 1.1084718923198638e-2 | 3.958828186856656e-4 | 5.938242280284984e-4 | 1.3855898653998297e-3\"",
      "from": "2015",
      "height": "8.4583",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LDA | SHORT TEXTS ( 2015 , 2017 ) (((2015,2017),2),20)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">short texts<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sparsity<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">word embeddings<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">word co-occurrence<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"word co-occurrence | lda | sparsity | short texts | word embeddings\"",
      "nodeType": "group",
      "penwidth": "4",
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      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">INSTITUTIONS | INTERNATIONAL COLLABORATION ( 2015 , 2017 ) (((2015,2017),2),24)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">research output<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research activities<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">citation impact<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation impact | institutions | research activities | research output | international collaboration\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "12953,3493.5",
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      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
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      "source": "[]",
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      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">INSTITUTIONS | RESEARCH OUTPUT ( 2015 , 2017 ) (((2015,2017),2),27)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">research output<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">scientometric analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">research productivity<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">citation impact<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation impact | institutions | research productivity | research output | scientometric analysis\"",
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      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
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      "support": "0",
      "to": "2017",
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      "frequence": "\"4.94853523357082e-3 | 1.979414093428328e-4 | 1.1084718923198638e-2 | 9.89707046714164e-4 | 7.917656373713312e-4\"",
      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">RECOMMENDATIONS | RECOMMENDATION SYSTEMS ( 2015 , 2017 ) (((2015,2017),2),34)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recommendations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">recommendation systems<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">user preference<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic distribution<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"recommendations | user preference | lda | recommendation systems | topic distribution\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "52828,3493.5",
      "role": "\"1.0 | 0.0 | 3.0 | 1.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
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      "support": "0",
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      "frequence": "\"1.7814726840854954e-3 | 1.1876484560569969e-2 | 1.3855898653998297e-3 | 7.917656373713312e-4 | 3.3650039588281576e-3\"",
      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">INSTITUTIONS | INTERNATIONAL COLLABORATION ( 2015 , 2017 ) (((2015,2017),2),37)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">institutions<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">research output<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">scopus database<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">academic papers<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"academic papers | institutions | research output | international collaboration | scopus database\"",
      "nodeType": "group",
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      "from": "2015",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">CITESPACE | WEB ( 2015 , 2017 ) (((2015,2017),2),43)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">citespace<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">web<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research hotspots<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">visualization analysis<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">cluster analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">research field<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"research field | cluster analysis | web | citespace | visualization analysis | research hotspots\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "8565.7,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "9.6389"
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    {
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      "name": "group20152017248",
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      "fontname": "Arial",
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      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 3.7608867775138235e-3 | 5.938242280284984e-4 | 1.5835312747426624e-3 | 2.3752969121139935e-3\"",
      "from": "2015",
      "height": "10.736",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">CONCEPT MAPS | MEANINGFUL LEARNING ( 2015 , 2017 ) (((2015,2017),2),48)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">meaningful learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">prior knowledge<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | teachers | meaningful learning | prior knowledge | learners\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "49971,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 2.0 | 2.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "10.736"
    },
    {
      "_gvid": 340,
      "name": "group20152017249",
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      "fontname": "Arial",
      "foundation": "\"438 | 441 | 447 | 780 | 785 | 799\"",
      "frequence": "\"1.5835312747426624e-3 | 2.7711797307996594e-3 | 2.3752969121139935e-3 | 1.3855898653998297e-3 | 2.7711797307996594e-3 | 3.5629453681709907e-3\"",
      "from": "2015",
      "height": "9.7778",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">ONLINE REVIEWS | CUSTOMERS ( 2015 , 2017 ) (((2015,2017),2),49)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">online reviews<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">customers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">websites<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">sentiment analysis<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">tourism<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">big data<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"tourism | customers | websites | online reviews | sentiment analysis | big data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "14775,3493.5",
      "role": "\"1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "9.7778"
    },
    {
      "_gvid": 341,
      "name": "group20152017250",
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      "fontname": "Arial",
      "foundation": "\"147 | 202 | 226 | 473 | 542 | 624\"",
      "frequence": "\"1.3855898653998297e-3 | 6.1361836896278174e-3 | 3.958828186856656e-4 | 3.958828186856656e-4 | 1.6627078384797954e-2 | 7.917656373713312e-4\"",
      "from": "2015",
      "height": "10.958",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">PATENTS | PATENT DATA ( 2015 , 2017 ) (((2015,2017),2),50)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">patents<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">patent data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">patent analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">unsupervised learning<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">industry<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"patents | industry | patent data | patent analysis | latent dirichlet allocation | unsupervised learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "34845,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 1.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "10.958"
    },
    {
      "_gvid": 342,
      "name": "group20152017251",
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      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"92 | 162 | 246 | 317 | 449 | 781\"",
      "frequence": "\"1.4845605700712462e-2 | 1.7814726840854954e-3 | 5.938242280284984e-4 | 3.7608867775138235e-3 | 3.958828186856656e-4 | 5.146476642913653e-3\"",
      "from": "2015",
      "height": "11.514",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">KEYWORDS | ENVIRONMENTAL SCIENCES ( 2015 , 2017 ) (((2015,2017),2),51)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">keywords<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">environmental sciences<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">ecology<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">author keywords<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">research trends<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research hotspots<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"keywords | ecology | author keywords | research trends | environmental sciences | research hotspots\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "9911.7,3493.5",
      "role": "\"3.0 | 3.0 | 1.0 | 3.0 | 2.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "11.514"
    },
    {
      "_gvid": 343,
      "name": "group20152017253",
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      "fontname": "Arial",
      "foundation": "\"430 | 480 | 523 | 542 | 574 | 658\"",
      "frequence": "\"3.167062549485325e-3 | 1.1876484560569968e-3 | 1.979414093428328e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 1.7814726840854954e-3\"",
      "from": "2015",
      "height": "12.139",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">LATENT DIRICHLET ALLOCATION | DEEP LEARNING ( 2015 , 2017 ) (((2015,2017),2),53)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">deep learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">natural language processing<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">nlp<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">summarization<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"summarization | natural language processing | nlp | latent dirichlet allocation | lda | deep learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "6895.7,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "12.139"
    },
    {
      "_gvid": 344,
      "name": "group20152017254",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"121 | 759 | 761 | 770 | 802 | 806\"",
      "frequence": "\"1.979414093428328e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 9.89707046714164e-4 | 5.938242280284984e-4\"",
      "from": "2015",
      "height": "8",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TWITTER | HASHTAGS ( 2015 , 2017 ) (((2015,2017),2),54)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social media data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">tracking<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"tracking | twitter | tweets | social media | social media data | hashtags\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "60490,3493.5",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 1.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "8"
    },
    {
      "_gvid": 345,
      "name": "group20152017255",
      "bId": "29",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"85 | 185 | 209 | 284 | 431 | 545 | 657\"",
      "frequence": "\"9.303246239113142e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 2.5732383214568267e-3 | 9.89707046714164e-4 | 1.979414093428328e-4 | 9.89707046714164e-4\"",
      "from": "2015",
      "height": "9.6944",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">EXPERIMENTAL GROUP | LEARNING ( 2015 , 2017 ) (((2015,2017),2),55)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">experimental group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">control group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">mind maps<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">music<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | learning | teachers | mind maps | control group | music | experimental group\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "62494,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "9.6944"
    },
    {
      "_gvid": 346,
      "name": "group20152017256",
      "bId": "25",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"85 | 102 | 185 | 209 | 266 | 431 | 657\"",
      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 5.938242280284984e-4 | 9.89707046714164e-4 | 9.89707046714164e-4\"",
      "from": "2015",
      "height": "10.694",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LEARNING | CONCEPT MAPS ( 2015 , 2017 ) (((2015,2017),2),56)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">experimental group<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">meaningful learning<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">control group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | teachers | meaningful learning | control group | experimental group\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "50815,3493.5",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2017-01-01\"",
      "strTo": "\"2017-12-15\"",
      "support": "0",
      "to": "2017",
      "weight": "Nothing",
      "width": "10.694"
    },
    {
      "_gvid": 347,
      "name": "period20162018",
      "fontsize": "50",
      "from": "2016",
      "height": "0.875",
      "label": "2016 2018",
      "nodeType": "period",
      "pos": "64286,2488",
      "shape": "box",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "to": "2018",
      "width": "3.9444"
    },
    {
      "_gvid": 348,
      "name": "group2016201820",
      "bId": "25",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"85 | 102 | 185 | 388 | 521 | 711\"",
      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 2.3752969121139935e-3 | 1.979414093428328e-4 | 0.0\"",
      "from": "2016",
      "height": "9.5",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LEARNING | LEARNERS ( 2016 , 2018 ) (((2016,2018),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learners<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">e-learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">engineering education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | learners | e-learning | engineering education\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "48344,2488",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "9.5"
    },
    {
      "_gvid": 349,
      "name": "group2016201825",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"167 | 413 | 759 | 761 | 807\"",
      "frequence": "\"5.938242280284984e-4 | 3.167062549485325e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.938242280284984e-4\"",
      "from": "2016",
      "height": "8.0139",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">TWEETS | TWITTER ( 2016 , 2018 ) (((2016,2018),2),5)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social networks<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">geographical locations<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"geographical locations | social networks | twitter | tweets | twitter data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "59895,2488",
      "role": "\"2.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "8.0139"
    },
    {
      "_gvid": 350,
      "name": "group2016201829",
      "bId": "4",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"69 | 496 | 542 | 574 | 603\"",
      "frequence": "\"1.7814726840854954e-3 | 7.917656373713312e-4 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 1.979414093428328e-4\"",
      "from": "2016",
      "height": "9.3889",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LATENT DIRICHLET ALLOCATION | LDA ( 2016 , 2018 ) (((2016,2018),2),9)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">f measure<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">text documents<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">information retrieval<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"information retrieval | text documents | latent dirichlet allocation | lda | f measure\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "5607.7,2488",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "9.3889"
    },
    {
      "_gvid": 351,
      "name": "group20162018213",
      "bId": "7",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"59 | 151 | 329 | 356 | 696\"",
      "frequence": "\"3.958828186856656e-4 | 2.969121140142492e-3 | 1.3855898653998297e-3 | 7.917656373713312e-4 | 3.3650039588281576e-3\"",
      "from": "2016",
      "height": "12.75",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">INTERNATIONAL COLLABORATION | RESEARCH OUTPUT ( 2016 , 2018 ) (((2016,2018),2),13)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">research output<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">scopus database<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">citation impact<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">citation counts<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation impact | citation counts | research output | international collaboration | scopus database\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "12444,2488",
      "role": "\"2.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
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      "height": "10.639",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">3D MAP | SEMANTIC INFORMATION ( 2016 , 2018 ) (((2016,2018),2),24)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">3d map<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">semantic information<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">semantics<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">semantic map<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">labeling<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"semantic map | semantics | labeling | semantic information | 3d map\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "18804,2488",
      "role": "\"1.0 | 1.0 | 3.0 | 1.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
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      "source": "[]",
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      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "10.639"
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    {
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      "fontname": "Arial",
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      "frequence": "\"1.7814726840854954e-3 | 9.303246239113142e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 9.89707046714164e-4 | 2.5732383214568267e-3\"",
      "from": "2016",
      "height": "9.5972",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LEARNING | LEARNING PROCESS ( 2016 , 2018 ) (((2016,2018),2),30)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">learning process<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">higher education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">decision-making<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"decision-making | education | learning | teachers | learning process | higher education\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "62990,2488",
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      "source": "[]",
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      "support": "0",
      "to": "2018",
      "weight": "Nothing",
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      "fontname": "Arial",
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      "frequence": "\"3.958828186856656e-4 | 1.1084718923198638e-2 | 2.1179730799683112e-2 | 2.3752969121139935e-3 | 3.958828186856656e-4 | 5.938242280284984e-4\"",
      "from": "2016",
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      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TOPIC MODELS | SHORT TEXTS ( 2016 , 2018 ) (((2016,2018),2),32)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">short texts<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sparsity<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent topic<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">word co-occurrence<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"word co-occurrence | lda | topic models | latent topic | sparsity | short texts\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "45197,2488",
      "role": "\"3.0 | 3.0 | 3.0 | 1.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
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      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "9.0833"
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    {
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      "name": "group20162018236",
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      "foundation": "\"413 | 759 | 761 | 770 | 785 | 802 | 806\"",
      "frequence": "\"3.167062549485325e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 2.7711797307996594e-3 | 9.89707046714164e-4 | 5.938242280284984e-4\"",
      "from": "2016",
      "height": "9.5278",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TWITTER | HASHTAGS ( 2016 , 2018 ) (((2016,2018),2),36)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">social media data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">social networks<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"social networks | twitter | tweets | social media | sentiment analysis | social media data | hashtags\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "60599,2488",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
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      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "9.5278"
    },
    {
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      "name": "group20162018239",
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      "fontname": "Arial",
      "foundation": "\"438 | 441 | 447 | 542 | 574 | 723 | 780\"",
      "frequence": "\"1.5835312747426624e-3 | 2.7711797307996594e-3 | 2.3752969121139935e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 3.958828186856656e-4 | 1.3855898653998297e-3\"",
      "from": "2016",
      "height": "11.403",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"lightcoral\">LATENT DIRICHLET ALLOCATION | ONLINE REVIEWS ( 2016 , 2018 ) (((2016,2018),2),39)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">online reviews<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"lightcoral\">service quality<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">customers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">websites<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tourism<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"tourism | customers | websites | latent dirichlet allocation | lda | service quality | online reviews\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "14775,2488",
      "role": "\"3.0 | 3.0 | 3.0 | 1.0 | 1.0 | 0.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2018-01-01\"",
      "strTo": "\"2018-12-31\"",
      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "11.403"
    },
    {
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      "name": "group20162018241",
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      "fontname": "Arial",
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      "frequence": "\"2.3752969121139935e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 1.3855898653998297e-3 | 5.740300870942151e-3 | 2.7711797307996594e-3 | 5.938242280284984e-4 | 5.938242280284984e-4\"",
      "from": "2016",
      "height": "9.7639",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TWITTER | TWEETS ( 2016 , 2018 ) (((2016,2018),2),41)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media platforms<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">opinions<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">facebook<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"opinions | twitter | tweets | facebook | social media | sentiment analysis | twitter data | social media platforms\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "61365,2488",
      "role": "\"3.0 | 3.0 | 3.0 | 1.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
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      "support": "0",
      "to": "2018",
      "weight": "Nothing",
      "width": "9.7639"
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      "_gvid": 358,
      "name": "period20172019",
      "fontsize": "50",
      "from": "2017",
      "height": "0.875",
      "label": "2017 2019",
      "nodeType": "period",
      "pos": "64286,1486",
      "shape": "box",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "to": "2019",
      "width": "3.9444"
    },
    {
      "_gvid": 359,
      "name": "group2017201920",
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      "fontname": "Arial",
      "foundation": "\"85 | 102 | 185 | 431 | 536\"",
      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 9.89707046714164e-4 | 1.979414093428328e-4\"",
      "from": "2017",
      "height": "10.167",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">COLLABORATIVE LEARNING | LEARNING ( 2017 , 2019 ) (((2017,2019),2),0)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">collaborative learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">control group<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | control group | collaborative learning\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "46582,1486",
      "role": "\"3.0 | 3.0 | 3.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "10.167"
    },
    {
      "_gvid": 360,
      "name": "group2017201927",
      "bId": "20",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"12 | 13 | 33 | 176 | 214\"",
      "frequence": "\"2.5732383214568267e-3 | 3.958828186856656e-4 | 2.1773555027711613e-3 | 5.938242280284984e-4 | 7.917656373713312e-4\"",
      "from": "2017",
      "height": "9.7222",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LIBRARY | LIBRARIANS ( 2017 , 2019 ) (((2017,2019),2),7)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">library<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">librarians<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">information science<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">journal citation report<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">impact factors<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"library | journal citation report | information science | impact factors | librarians\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "36453,1486",
      "role": "\"3.0 | 2.0 | 2.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "9.7222"
    },
    {
      "_gvid": 361,
      "name": "group20172019210",
      "bId": "19",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"42 | 147 | 226 | 437 | 473\"",
      "frequence": "\"4.94853523357082e-3 | 1.3855898653998297e-3 | 3.958828186856656e-4 | 9.89707046714164e-4 | 3.958828186856656e-4\"",
      "from": "2017",
      "height": "10.056",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">PATENTS | PATENT DATA ( 2017 , 2019 ) (((2017,2019),2),10)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">patents<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">patent data<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">patent analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">technological innovation<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">indicators<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"indicators | patents | patent data | technological innovation | patent analysis\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "34845,1486",
      "role": "\"2.0 | 2.0 | 2.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "10.056"
    },
    {
      "_gvid": 362,
      "name": "group20172019212",
      "bId": "7",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"317 | 329 | 356 | 696 | 772\"",
      "frequence": "\"3.7608867775138235e-3 | 1.3855898653998297e-3 | 7.917656373713312e-4 | 3.3650039588281576e-3 | 5.542359461599319e-3\"",
      "from": "2017",
      "height": "12.375",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">INTERNATIONAL COLLABORATION | RESEARCH OUTPUT ( 2017 , 2019 ) (((2017,2019),2),12)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">international collaboration<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">research output<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">vosviewer<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">scopus database<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">research trends<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"research trends | research output | international collaboration | scopus database | vosviewer\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "12444,1486",
      "role": "\"1.0 | 2.0 | 2.0 | 3.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "12.375"
    },
    {
      "_gvid": 363,
      "name": "group20172019217",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"624 | 759 | 761 | 770 | 806\"",
      "frequence": "\"7.917656373713312e-4 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 5.938242280284984e-4\"",
      "from": "2017",
      "height": "8",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">TWITTER | HASHTAGS ( 2017 , 2019 ) (((2017,2019),2),17)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">unsupervised learning<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"unsupervised learning | twitter | tweets | social media | hashtags\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "59360,1486",
      "role": "\"2.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "8"
    },
    {
      "_gvid": 364,
      "name": "group20172019224",
      "bId": "29",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"85 | 185 | 209 | 284 | 569\"",
      "frequence": "\"9.303246239113142e-3 | 9.699129057798808e-3 | 3.7608867775138235e-3 | 2.5732383214568267e-3 | 2.5732383214568267e-3\"",
      "from": "2017",
      "height": "8.6667",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD COLOR=\"black\">LEARNING | TEACHERS ( 2017 , 2019 ) (((2017,2019),2),24)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">teachers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">higher education<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">mind maps<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | learning | teachers | mind maps | higher education\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "63445,1486",
      "role": "\"3.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6,0.7,0.7999999999999999]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "8.6667"
    },
    {
      "_gvid": 365,
      "name": "group20172019232",
      "bId": "26",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"257 | 286 | 564 | 577 | 597 | 671\"",
      "frequence": "\"4.94853523357082e-3 | 1.5835312747426624e-3 | 1.979414093428328e-4 | 9.89707046714164e-4 | 2.1179730799683112e-2 | 2.3752969121139935e-3\"",
      "from": "2017",
      "height": "12",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">RECOMMENDATIONS | USER PREFERENCE ( 2017 , 2019 ) (((2017,2019),2),32)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">recommendations<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">user preference<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">recommendation systems<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent topic<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">real world<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"recommendations | real world | user preference | recommendation systems | topic models | latent topic\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "52427,1486",
      "role": "\"3.0 | 1.0 | 2.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "12"
    },
    {
      "_gvid": 366,
      "name": "group20172019233",
      "bId": "13",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"42 | 176 | 230 | 644 | 703\"",
      "frequence": "\"4.94853523357082e-3 | 5.938242280284984e-4 | 1.979414093428328e-4 | 0.0 | 5.938242280284984e-4\"",
      "from": "2017",
      "height": "11.111",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">INDICATORS | JOURNAL IMPACT FACTOR ( 2017 , 2019 ) (((2017,2019),2),33)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">indicators<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">journal impact factor<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">impact factors<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">effect size<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">h-index<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"indicators | impact factors | journal impact factor | effect size | h-index\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "25612,1486",
      "role": "\"2.0 | 2.0 | 2.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "11.111"
    },
    {
      "_gvid": 367,
      "name": "group20172019241",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"489 | 759 | 761 | 770 | 785 | 802 | 806 | 807\"",
      "frequence": "\"5.344418052256486e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 2.7711797307996594e-3 | 9.89707046714164e-4 | 5.938242280284984e-4 | 5.938242280284984e-4\"",
      "from": "2017",
      "height": "9.3472",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">TWITTER | TWEETS ( 2017 , 2019 ) (((2017,2019),2),41)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter data<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">social media data<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">sentiment analysis<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">platform<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"platform | twitter | tweets | social media | sentiment analysis | social media data | hashtags | twitter data\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "60418,1486",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 3.0 | 2.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "9.3472"
    },
    {
      "_gvid": 368,
      "name": "group20172019245",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"489 | 759 | 763 | 770 | 799 | 820\"",
      "frequence": "\"5.344418052256486e-3 | 3.958828186856656e-3 | 1.3855898653998297e-3 | 5.740300870942151e-3 | 3.5629453681709907e-3 | 5.938242280284984e-4\"",
      "from": "2017",
      "height": "9.6389",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">SOCIAL MEDIA PLATFORMS | TWITTER ( 2017 , 2019 ) (((2017,2019),2),45)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">social media platforms<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">facebook<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">platform<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">big data<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"platform | twitter | facebook | social media | big data | social media platforms\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "61365,1486",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 1.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "9.6389"
    },
    {
      "_gvid": 369,
      "name": "group20172019253",
      "bId": "17",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"63 | 199 | 240 | 244 | 316 | 717\"",
      "frequence": "\"6.1361836896278174e-3 | 1.7814726840854954e-3 | 7.917656373713312e-4 | 3.5629453681709907e-3 | 3.3650039588281576e-3 | 7.917656373713312e-4\"",
      "from": "2017",
      "height": "11.292",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">CLASSIFICATION | CLASSIFICATION ACCURACY ( 2017 , 2019 ) (((2017,2019),2),53)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">classification<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">classification accuracy<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">classifiers<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">labeling<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">hierarchical<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">recognition<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"classification | recognition | hierarchical | labeling | classifiers | classification accuracy\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "32193,1486",
      "role": "\"3.0 | 2.0 | 1.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "11.292"
    },
    {
      "_gvid": 370,
      "name": "group20172019256",
      "bId": "13",
      "branchId": "0 2 1 10 86 192",
      "fontname": "Arial",
      "foundation": "\"31 | 151 | 176 | 230 | 651 | 703\"",
      "frequence": "\"3.958828186856656e-4 | 2.969121140142492e-3 | 5.938242280284984e-4 | 1.979414093428328e-4 | 3.167062549485325e-3 | 5.938242280284984e-4\"",
      "from": "2017",
      "height": "11.181",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">JOURNAL IMPACT FACTOR | IMPACT FACTORS ( 2017 , 2019 ) (((2017,2019),2),56)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">journal impact factor<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">impact factors<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">h-index<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">citation counts<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">citation indexes<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">science database<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"citation indexes | citation counts | impact factors | journal impact factor | science database | h-index\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "24068,1486",
      "role": "\"2.0 | 2.0 | 2.0 | 2.0 | 1.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "11.181"
    },
    {
      "_gvid": 371,
      "name": "group20172019266",
      "bId": "25",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"85 | 102 | 185 | 264 | 388 | 431 | 657\"",
      "frequence": "\"9.303246239113142e-3 | 6.1361836896278174e-3 | 9.699129057798808e-3 | 1.3855898653998297e-3 | 2.3752969121139935e-3 | 9.89707046714164e-4 | 9.89707046714164e-4\"",
      "from": "2017",
      "height": "10.069",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">EXPERIMENTAL GROUP | LEARNING ( 2017 , 2019 ) (((2017,2019),2),66)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">experimental group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">learning<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">control group<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">concept maps<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">learners<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">education<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">questionnaire<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"education | concept maps | learning | questionnaire | learners | control group | experimental group\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "51309,1486",
      "role": "\"3.0 | 3.0 | 3.0 | 1.0 | 2.0 | 2.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "10.069"
    },
    {
      "_gvid": 372,
      "name": "group20172019267",
      "bId": "12",
      "branchId": "0 2 1 10 86 175",
      "fontname": "Arial",
      "foundation": "\"198 | 231 | 244 | 283 | 477 | 542 | 574\"",
      "frequence": "\"1.979414093428328e-3 | 9.89707046714164e-4 | 3.5629453681709907e-3 | 3.3650039588281576e-3 | 5.344418052256486e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2\"",
      "from": "2017",
      "height": "9.8611",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">LATENT DIRICHLET ALLOCATION | LDA ( 2017 , 2019 ) (((2017,2019),2),67)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">machine learning<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">labeling<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">representativeness<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">patients<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">correctness<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"representativeness | correctness | labeling | patients | machine learning | latent dirichlet allocation | lda\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "17848,1486",
      "role": "\"2.0 | 2.0 | 3.0 | 2.0 | 2.0 | 3.0 | 1.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "9.8611"
    },
    {
      "_gvid": 373,
      "name": "group20172019269",
      "bId": "8",
      "branchId": "0 2 1 10 86",
      "fontname": "Arial",
      "foundation": "\"438 | 441 | 542 | 574 | 723 | 724 | 780\"",
      "frequence": "\"1.5835312747426624e-3 | 2.7711797307996594e-3 | 1.6627078384797954e-2 | 1.1084718923198638e-2 | 3.958828186856656e-4 | 9.89707046714164e-4 | 1.3855898653998297e-3\"",
      "from": "2017",
      "height": "13.083",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">CUSTOMER SATISFACTION | LATENT DIRICHLET ALLOCATION ( 2017 , 2019 ) (((2017,2019),2),69)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">customer satisfaction<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">latent dirichlet allocation<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">online reviews<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">customers<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">service quality<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">tourism<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"tourism | customers | latent dirichlet allocation | lda | service quality | customer satisfaction | online reviews\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "14775,1486",
      "role": "\"2.0 | 2.0 | 3.0 | 3.0 | 2.0 | 2.0 | 2.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "13.083"
    },
    {
      "_gvid": 374,
      "name": "group20172019271",
      "bId": "24",
      "branchId": "0 2 1 10 86 192 185",
      "fontname": "Arial",
      "foundation": "\"241 | 286 | 407 | 574 | 597 | 692 | 729 | 850\"",
      "frequence": "\"3.958828186856656e-4 | 1.5835312747426624e-3 | 2.1773555027711613e-3 | 1.1084718923198638e-2 | 2.1179730799683112e-2 | 3.958828186856656e-4 | 5.938242280284984e-4 | 1.3855898653998297e-3\"",
      "from": "2017",
      "height": "10.75",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"skyblue\">TOPIC MODELS | SHORT TEXTS ( 2017 , 2019 ) (((2017,2019),2),71)<\/TD><\/TR>\n                                                                                                                     <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">topic models<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">short texts<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">sparsity<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">lda<\/TD><\/TR>\n                                                                                                                     <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">word embeddings<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"skyblue\">word co-occurrence<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">real world<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">semantic information<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"word co-occurrence | real world | semantic information | lda | topic models | sparsity | short texts | word embeddings\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "45415,1486",
      "role": "\"2.0 | 1.0 | 1.0 | 3.0 | 3.0 | 2.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2019-01-01\"",
      "strTo": "\"2019-12-31\"",
      "support": "0",
      "to": "2019",
      "weight": "Nothing",
      "width": "10.75"
    },
    {
      "_gvid": 375,
      "name": "period20182020",
      "fontsize": "50",
      "from": "2018",
      "height": "0.875",
      "label": "2018 2020",
      "nodeType": "period",
      "pos": "64286,471.5",
      "shape": "box",
      "strFrom": "\"2020-01-01\"",
      "strTo": "\"2020-12-20\"",
      "to": "2020",
      "width": "3.9444"
    },
    {
      "_gvid": 376,
      "name": "group2018202022",
      "bId": "28",
      "branchId": "0 2 1 10 86 192 194",
      "fontname": "Arial",
      "foundation": "\"97 | 759 | 761 | 770 | 806\"",
      "frequence": "\"8.313539192398977e-3 | 3.958828186856656e-3 | 2.5732383214568267e-3 | 5.740300870942151e-3 | 5.938242280284984e-4\"",
      "from": "2018",
      "height": "7.2083",
      "label": "<FONT POINT-SIZE=\"14\" ALIGN=\"LEFT\"><TABLE BORDER=\"0\" CELLBORDER=\"0\" BGCOLOR=\"white\"><TR><TD BGCOLOR=\"khaki\">TWITTER | HASHTAGS ( 2018 , 2020 ) (((2018,2020),2),2)<\/TD><\/TR>\n                                                                                                                    <TR><TD HEIGHT=\"10\"><\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">twitter<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">hashtags<\/TD> <TD ALIGN=\"LEFT\" COLOR=\"black\">tweets<\/TD> <TD ALIGN=\"LEFT\" BGCOLOR=\"khaki\">user<\/TD><\/TR>\n                                                                                                                    <TR><TD ALIGN=\"LEFT\" COLOR=\"black\">social media<\/TD><\/TR><\/TABLE><\/FONT>",
      "lbl": "\"user | twitter | tweets | social media | hashtags\"",
      "nodeType": "group",
      "penwidth": "4",
      "pos": "59994,471.5",
      "role": "\"1.0 | 3.0 | 3.0 | 3.0 | 3.0\"",
      "seaLvl": "[0.0,0.1,0.2,0.30000000000000004,0.4,0.5,0.6]",
      "shape": "square",
      "source": "[]",
      "strFrom": "\"2020-01-01\"",
      "strTo": "\"2020-12-20\"",
      "support": "0",
      "to": "2020",
      "weight": "Nothing",
      "width": "7.2083"
    },
    {
      "_gvid": 377,
      "name": "group2018202023",
      "bId": "28",
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