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

[Q]: Which American actor and singer has joined Amanda Holden as one of the judges on the current series of 'Britain's Got Talent'?
[A]: britain's got talent


[Q]: Who choreographed the ballets Swan Lake and Don Quixote, among others?
[A]: don quixote


[Q]: What is the capital of Cuba?
[A]:
cuba