instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
What horse won the 2009 Grand National?
answer:
2009 grand national


question:
What nickname is given to the Australian Association Football International team?
answer:
australia


question:
Who directed 2001: A Space Odyssey?
answer:

2001: a space odyssey