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

[EX Q]: Who succeeded Jon Pertwee as Doctor Who?
[EX A]: doctor who

[EX Q]: Which current Broadway musical has a Japanese therapist character called Christmas Eve?
[EX A]: christmas eve

[EX Q]: In which country did the bossa nova originate?
[EX A]:
bossa nova