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

Let me give you an example: Who was the first American President?
The answer to this example can be: president of the united states
Here is why: The question talks about the president of the USA.

OK. solve this:
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