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

[Q]: Which of the American Idol judges has been there for all 10 seasons?
[A]: american idol


[Q]: Who in the 1930's wrote the novel 'Cakes And Ale'?
[A]: cakes and ale


[Q]: Where would you find Changi Airport?
[A]:
singapore changi airport