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

Q: Established in 1919, which is the world's oldest surviving airline?

A: airline
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Q: What horse won the 2009 Grand National?

A: 2009 grand national
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Q: Which Bolton-born woman, the founder of Pall-Ex Ltd, replaced James Caan on BBC's Dragons Den?

A:
dragons' den
****