TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which famous film did Michael Caine play a character named Charlie Croker?

SOLUTION: charlie croker

PROBLEM: With what sport is Dennis Compton associated?

SOLUTION: denis compton

PROBLEM: Can you name the singer of the title track for '1971 - Diamonds Are Forever'?

SOLUTION:
diamonds are forever