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 famous film did Michael Caine play a character named Charlie Croker?
[EX A]: charlie croker

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

[EX Q]: In which constellation is the bright star Deneb?
[EX A]:
deneb