TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Richard Addinsell's most famous piece of music was used in the 1941 film 'Dangerous Moonlight', what is its title?

SOLUTION: dangerous moonlight

PROBLEM: In book and film, which vessel was commanded by Charlie Allnut?

SOLUTION: charlie allnut

PROBLEM: Barbie Girl was an International hit by Aqua who hailed from which country?

SOLUTION:
barbie girl