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

Q: Which English king was married to Eleanor of Castile?

A: eleanor of castile
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Q: Which Chuck Berry song is performed by Marty McFly at the end of the film Back to the Future?

A: back to the future
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Q: Who won the 1954 Academy Award for Best Actress for her role in the film 'Country Girl'?

A:
the country girl
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