TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: 'Dookie' and '21st. Century Breakdown' are albums by which American rock band?

SOLUTION: 21st century breakdown

PROBLEM: Name Alfred Hitchcock's first sound film as director?

SOLUTION: alfred hitchcock

PROBLEM: Bruce Willis is best known for his role of John McCain in which film series?

SOLUTION:
bruce willis