Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: I which European city will you find 'Dam Square'?

Answer: dam square


Question: Who won a Gold Medal for Britain in the men's 100 metres at the 1992 Summer Olympic Games in Barcelona?

Answer: britain


Question: Who wrote the book The Hound Of The Baskervilles?

Answer:
the hound of the baskervilles