TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What American swimmer won eight gold medals at the 2008 Olympics?

SOLUTION: 2008 summer olympics

PROBLEM: Who was the first person to sign the American Declaration of Independence?

SOLUTION: united states declaration of independence

PROBLEM: Who won the 2011 Turner Prize for his installation 'Do Words Have Voices'?

SOLUTION:
2011 turner prize