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

Q: Which 20th century British prime minister had the longest surname ?

A: prime minister of the united kingdom
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Q: The song Don't Rain On My Parade features in which musical?

A: don't rain on my parade
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Q: What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?

A:
sudden impact
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