instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Christian Grey is a character in what recent book trilogy?
answer:
christian grey

question:
What famous song from the film Butch Cassidy and the Sundance Kid won an Oscar for best song?
answer:
academy award for best original song

question:
Which cathedral contains the tomb of English monarch Edward II?
answer:
edward ii of england