Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: What horse won the 2009 Grand National?

Answer: 2009 grand national


Question: What's the name of Doctor Who's home planet ?

Answer: doctor who


Question: Fasten your seatbelts, it's going to be a bumpy night, is a Bette Davis line from which film?

Answer:
bette davis