instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which horse won the 2008 Grand National?
answer:
2008 grand national


question:
What name is given to the Fourth (4th) movement in Beethoven's / Ninth (9th) Symphony?
answer:
ludwig van beethoven


question:
Deneb is the brightest star of which constellation?
answer:

deneb