instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In which English city was Damien Hirst born?
answer:
damien hirst

question:
The Cato Street Conspiracy was a plot to kill which British Prime Minister?
answer:
prime minister of the united kingdom

question:
What is the capital city of China?
answer:
china