TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: The rivers Axe, Brue, Cary, Parrett, eta, are in which English county?

SOLUTION: castle cary

PROBLEM: Mr Barkis, Edward Murdstone and Tommy Traddles are all characters in which Charles Dickens novel?

SOLUTION: charles dickens

PROBLEM: Which all-girl group had a hit in 1998 with 'C'est La Vie'?

SOLUTION:
c'est la vie