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

[Q]: What's the name of Doctor Who's home planet ?
[A]: doctor who


[Q]: Which Frenchman composed Clair de lune, the famous third movement of Suite bergamasque?
[A]: suite bergamasque


[Q]: Bourbon whisky is named after a county in which US state?
[A]:
bourbon