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

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

[EX Q]: The Cato Street Conspiracy was a plot to kill which British Prime Minister?
[EX A]: prime minister of the united kingdom

[EX Q]: Danny Zuko was a main character in what film?
[EX A]:
danny zuko