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 horse won the 2009 Grand National?

SOLUTION: 2009 grand national

PROBLEM: What is the capital city of Colombia?

SOLUTION: colombia

PROBLEM: Early Sunday Morning and Chop Suey are works by which artist?

SOLUTION:
early sunday morning