[Q]: Determine the topic of the question-answer pair. Question: "who rules communism government?"; Answer: "It has a form of government characterized by single-party rule or dominant-party rule of a communist party (referred as Dictatorship of the Proletariat by its proponents) and a professed allegiance to a Leninist or MarxistLeninist ideology as the guiding principle of the state."? Topic:
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[A]: Communist state

[Q]: Determine the topic of the question-answer pair. Question: "what is lung effusion?"; Answer: "Pleural effusion is excess fluid that accumulates between the two pleural layers , the fluid-filled space that surrounds the lungs."? Topic:
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[A]: Pleural effusion

[Q]: Determine the topic of the question-answer pair. Question: "what fantasy american football means?"; Answer: "Fantasy football is an interactive competition in which users compete against each other as general managers of virtual teams."? Topic:
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[A]: Fantasy football (American)

[Q]: Determine the topic of the question-answer pair. Question: "what is the official language of america??"; Answer: "The most commonly used language is English ."? Topic:
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[A]:
Languages of the United States