TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Ewart was the middle name of which British Prime Minister?

SOLUTION: prime minister of the united kingdom

PROBLEM: Alexander the Great died in which ancient city?

SOLUTION: alexander the great

PROBLEM: What was the name of Sigourney Weaver's character in the 'Alien' films?

SOLUTION:
sigourney weaver