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 Bob Dylan songs 'Desolation Row', 'Tombstone Blues' and 'Like A Rolling Stone' featured on which album?

SOLUTION: tombstone blues

PROBLEM: Which Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?

SOLUTION: chris kyle

PROBLEM: What links French dramatist Pierre Corneille (1606-1684) and actor Charlton Heston (1923-2008)?

SOLUTION:
charlton heston