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

[EX Q]: Which was the title of the 7th and final book in the Chronicles of Narnia by C.S. Lewis?
[EX A]: the chronicles of narnia

[EX Q]: Billy the Kid was a native of which US state?
[EX A]: billy

[EX Q]: The region of Catalonia is part of which country?
[EX A]:
catalonia