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

Q: What's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?

A: sudden impact
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Q: Which film director won the Oscar for Best Picture for the film 12 Years a Slave in 2013?

A: 12 years a slave
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Q: Bird in Space was a famous work by whom?

A:
bird in space
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