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

Q: Brasilia is the capital but which city in Brazil has the largest population?

A: brazil
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Q: What is the alcoholic ingredient of a Screwdriver cocktail?

A: screwdriver
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Q: In which city is the film Don't Look Now set?

A:
don't look now
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