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

Q: Which boxer was nicknames 'The Brown Bomber'?

A: boxing
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Q: What was the currency of Austria before the Euro?

A: austria
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Q: In which country was there a civil war between 1861 and 1865, which was lost by the Confederate forces?

A:
american civil war
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