instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Billy the Kid was a native of which US state?
answer:
billy


question:
Which four letter word beginning with 'F' is a white crumbly Greek cheese, made from sheep's or goats milk and cured in brine?
answer:
sheep


question:
Which is the oldest college of Cambridge University?
answer:

cambridge