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

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

[EX Q]: What is the nationality of Chelsy Davy, former girlfriend of Prince Harry?
[EX A]: chelsy davy

[EX Q]: In the British Army, which commissioned rank is indicated by a crown on each shoulder?
[EX A]:
british army