instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
What type of creature is an argali?
answer:
argali


question:
The film The Curious Case of Benjamin Button, starring Brad Pitt, is based on a short story by whom?
answer:
the curious case of benjamin button


question:
Who wrote the novels A Week in December and 'Birdsong?
answer:

birdsong