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 horse won the 2009 Epsom Derby?
[EX A]: 2009 epsom derby

[EX Q]: Who commanded the Scottish army at the Battle Of Bannockburn?
[EX A]:
battle of bannockburn