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: Which pop group consisted of Huw Bunford, Clan Caren, Dafydd Leuan, Guto Price and Gryff Rhuys?

SOLUTION: huw bunford

PROBLEM: What American TV serial, first broadcast between April 1990 and June 1991, followed an investigation headed by Special Agent Dale Cooper?

SOLUTION:
dale cooper