TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Who wrote `20,000 Leagues Under The Sea`?

SOLUTION: 20,000 leagues under the sea

PROBLEM: Ride of the Valkyries is the official quick march of which branch of the British Army?

SOLUTION: british army

PROBLEM: Which Disney film had the theme tune A Whole New World?

SOLUTION:
the walt disney company