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]: Which 2005 Disney film is set in the town of Oakey Oakes?
[EX A]: the walt disney company

[EX Q]: What name was given to the 1950-60s mainstream country music style of artists including Patsy Cline, Tammy Wynette, Jim Reeves, and Charlie Rich?
[EX A]:
charlie rich