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10 Government, Political System
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11 Political Institutions
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12 International Institutions, Relations, Conditions
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13 Political Ideology
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14 Political Issues
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15 Political Attitudes and Behavior
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16 Political Parties, Organizations
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17 Public Figures
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19 Armed Forces, Defense, Military Affairs
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20 Legal system, Legislation, Law
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30 Economic Systems
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31 Economic Policy, National Economic Situation
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32 Social Policy
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33 Budget and Fiscal Policy
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34 Public Expenditures
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35 Public Revenue
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36 Branches of Economy, Services and Transport
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37 Work and Industry
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38 Occupation, Profession
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39 Income
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40 Patterns of Consumption
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41 Saving, Investment of Money
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42 Stock Market and Monetary Transactions
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50 Society, Culture
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51 Community, Living Environment
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52 Group
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53 Family
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54 Person, Personality, Role
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55 Education, School Systems
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56 University, Research, the Sciences
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57 Religion and Weltanschauung
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58 Technology, Energy
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59 Medicine
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60 Leisure
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62 Communication, Public Opinion, Media
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65 Natural Environment, Nature
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75 Historical Social Research
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76 Historical Studies Data