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What is a republic?
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Who is the head of state?
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Where is the oldest parliament in the world?
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Which country has the most voters?
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Why do countries flags?
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What are districts and states?
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Do all nations have their own state?
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Where can you see all the flags of the world?
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Which state is smaller than the city?
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How many in the world of independent states?
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How many colonies in the world?
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How long does it take to cross Russia?
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What is a country?
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What country is the largest in the world?
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What is "people"?
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What are the most populated places in the world?
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What is a continent?
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What is common among different peoples?
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Is there enough space on Earth?
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In which country is the largest population?
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How does humanity change its planet?
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Where do people live?
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Why are some countries richer than others?
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Did people always live where and now?
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Does the population of the Earth grow?
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