instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which Bob Dylan song begins You got a lotta nerveTo say you are my friend. When I was down, You just stood there grinning?
answer:
bob dylan


question:
Aaron Copeland wrote a ballet about which American folk hero?
answer:
aaron copeland


question:
Which organisation won the 2013 Nobel Peace Prize?
answer:

2013 nobel peace prize