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

[EX Q]: Ride of the Valkyries is the official quick march of which branch of the British Army?
[EX A]: british army

[EX Q]: Which Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?
[EX A]: chris kyle

[EX Q]: Who created the character of Doctor Finlay in the British TV series (1962-1971) Dr Finlay's Casebook?
[EX A]:
doctor finlay