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: What city is closest to Copacabana beach?

Answer: copacabana, rio de janeiro


Question: In which war did the Sack of Badajoz takeplace?

Answer: siege of badajoz


Question: Borah Peak is the highest mountain in which US state?

Answer:
borah peak