instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who composed Air on the G String?
answer:
air on the g string


question:
Come Clean was the debut album by which 2000s band?
answer:
come clean


question:
Chelsea won the 2009 FA Cup final 2-1.  Who were the beaten finalists?
answer:

2009 fa cup final