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

Example Input: Which horse won the 2008 Grand National?
Example Output: 2008 grand national

Example Input: 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?
Example Output: boxing

Example Input: Which poem by Alexander Pope contains the famous line 'Fools rush in where Angels fear to tread'?
Example Output:
alexander pope