Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?
[EX A]: eine kleine nachtmusik

[EX Q]: Richard Addinsell's most famous piece of music was used in the 1941 film 'Dangerous Moonlight', what is its title?
[EX A]: dangerous moonlight

[EX Q]: Which American actor founded his own martial art style called Chun Kuk Do?
[EX A]:
chun kuk do