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

Q: The rivers Axe, Brue, Cary, Parrett, eta, are in which English county?

A: castle cary
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Q: Grace Anna Goodhue was the wife of which US President?

A: grace coolidge
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Q: Which was the first part of the autobiographical trilogy, completed by 'As I Walked Out One Midsummer Morning' and 'A Moment Of War'?

A:
as i walked out one midsummer morning
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