Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Q: Austin is the state capitol of which US State?

A: austin, texas
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Q: In which film did Sharon Stone play the character 'Catherine Tramell?

A: catherine tramell
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Q: Which horse won the 2009 Epsom Derby?

A:
2009 epsom derby
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