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

Q: I which European city will you find 'Dam Square'?

A: dam square
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Q: In which British city would you find Barlinnie prison?

A: hm prison barlinnie
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Q: Who composed the opera Cavalleria Rusticana?

A:
cavalleria rusticana
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