instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Ride of the Valkyries is the official quick march of which branch of the British Army?
answer:
british army


question:
Who wrote the poem Elegy Written in a Country Churchyard?
answer:
elegy written in a country churchyard


question:
Who played Ava Gardner in The Aviator?
answer:

the aviator