instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who won the 2011 Booker Prize for 'The Sense of an Ending'?
answer:
the sense of an ending


question:
Which country mainly makes up the Horn of Africa?
answer:
africa


question:
Who was Arthur Conan Doyle writing about when he said `He is the Napoleon of crime`?
answer:

arthur conan doyle