TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Name Alfred Hitchcock's first sound film as director?

SOLUTION: alfred hitchcock

PROBLEM: On which date do we celebrate 'Boxing Day'?

SOLUTION: boxing day

PROBLEM: In Which We Serve, This Happy Breed and Brief Encounter are early films by which director?

SOLUTION:
brief encounter