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

[EX Q]: In which US state are the Catskill Mountains?
[EX A]: catskill mountains

[EX Q]: Who choreographed the ballets Swan Lake and Don Quixote, among others?
[EX A]: don quixote

[EX Q]: What is the town called in which 'Clark Kent' grew up?
[EX A]:
superman