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

[EX Q]: From which musical did the song 'Chim Chim Cheree' come?
[EX A]: chim chim cher-ee

[EX Q]: Denzil Washington played which black militant leader in the 1992 film of the same name?
[EX A]: denzel washington

[EX Q]: Which was the main Indian tribe who defeated Custer at the battle of the Little Bighorn?
[EX A]:
battle of the little bighorn