instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Chris Martin is the lead singer with which band who had several hits in the 2000s?
answer:
chris martin

question:
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?
answer:
boxing

question:
The Crocodile Hunter was a nickname given to what Australian naturalist, who was killed by a slightly irritated sting ray in 2006?
answer:
the crocodile hunter