TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which race run at Chantilly in June is often referred to as the French Derby?

SOLUTION: chantilly racecourse

PROBLEM: Which of the American Idol judges has been there for all 10 seasons?

SOLUTION: american idol

PROBLEM: Which controversial rock star named his first two children `Moon Unit' and `Dweezil'?

SOLUTION:
moon zappa