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

[EX Q]: Which jockey won the 1981 UK Grand National on Aldaniti?
[EX A]: aldaniti

[EX Q]: Aaron Copeland wrote a ballet about which American folk hero?
[EX A]: aaron copeland

[EX Q]: Born 384 BCE, which philosopher was a tutor to Alexander the Great?
[EX A]:
alexander the great