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

[EX Q]: The film Schindler's List was based on whose Booker Prize winning novel of 1982?
[EX A]: schindler's list

[EX Q]: With eight goals which Barcelona player was the leading scorer in the 2009-10 Champions League?
[EX A]: barcelona

[EX Q]: Who teamed up with Kesha on the 2013 hit Crazy Kids?
[EX A]:
crazy kids