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 of North America's Great Lakes has the same name as a province of Canada?

SOLUTION: canada

PROBLEM: Which English comedian has joined Amanda Holden as one of the judges on the current series of 'Britain's Got Talent'?

SOLUTION: britain's got talent

PROBLEM: Who wrote the opera 'The Barber of Seville'?

SOLUTION:
the barber of seville