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

Q: The film The Curious Case of Benjamin Button, starring Brad Pitt, is based on a short story by whom?

A: the curious case of benjamin button
****
Q: Richard Addinsell's most famous piece of music was used in the 1941 film 'Dangerous Moonlight', what is its title?

A: dangerous moonlight
****
Q: The lands of Castile, which came to prominence in Europe in the 13th century, make up much of which modern country?

A:
castile
****