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

[EX Q]: 'Edward Lewis' and 'Vivian Ward' were the principal characters in which popular 1990 film?
[EX A]: edward lewis

[EX Q]: What's the name of Doctor Who's home planet ?
[EX A]: doctor who

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