TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: The Cato Street Conspiracy was a plot to kill which British Prime Minister?

SOLUTION: prime minister of the united kingdom

PROBLEM: Where is David Cameron's Oxfordshire constituency?

SOLUTION: david cameron

PROBLEM: Which historical figure was executed by emasculation, evisceration and beheading at Smithfield in 1305?

SOLUTION:
decapitation