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

[EX Q]: Which English Leicester-born boxer fought Marvin Hagler in 1983 for the WBC and WBA World Middleweight titles and lost by a technical knockout in the sixth round?
[EX A]: boxing

[EX Q]: Which engineer built the Menai Suspension Bridge and the Caledonian Canal?
[EX A]: menai suspension bridge

[EX Q]: Who spent 6 weeks at the top of the US Charts with Ain't it Funny?
[EX A]:
ain't it funny