Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: Charles Bingley was a character in what classic Jane Austen novel?
[EX A]: charles bingley

[EX Q]: What is the capital of the US state of Delaware?
[EX A]: delaware

[EX Q]: Which British Prime Minister introduced income tax, to help offset a reduction in revenue caused by a decline in trade?
[EX A]:
prime minister of the united kingdom