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

[EX Q]: Which English king was the son of Edward, the Black Prince?
[EX A]: edward, the black prince

[EX Q]: Christian Grey is a character in what recent book trilogy?
[EX A]: christian grey

[EX Q]: John Taylor and Roger Taylor are members of which band, which at times has also included Andy Taylor, although none of them are related?
[EX A]:
andy taylor