instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which team lost the 2009 Superbowl to the Pittsburgh Steelers?
answer:
super bowl xliii

question:
Betty Driver played which role in Coronation Street?
answer:
betty driver

question:
Whose first symphony of 1917 is known as The Classical Symphony?
answer:
symphony no. 1