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

[EX Q]: The Battle of Antietam was fought during which war?
[EX A]: battle of antietam

[EX Q]: Released last month, People, Hell and Angels is a posthumous album made up of songs recorded by which artist in 1969 ?
[EX A]: angel

[EX Q]: Which 19th Century poet wrote 'Clancy of the Overflow'?
[EX A]:
clancy of the overflow