TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which film did Sharon Stone play the character 'Catherine Tramell?

SOLUTION: catherine tramell

PROBLEM: Where is David Cameron's Oxfordshire constituency?

SOLUTION: david cameron

PROBLEM: Who composed the Clock Symphony?

SOLUTION:
symphony no. 101