instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which US state was the title of a no. 1 hit for the Bee Gees in 1967?
answer:
bee gees


question:
Who succeeded Henry Cooper as British Heavyweight Boxing Champion?
answer:
boxing


question:
In what country did the Bay of Pigs invasion happen?
answer:

bay of pigs invasion