TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which football team play home games at Bloomfield Road?

SOLUTION: bloomfield road

PROBLEM: The film The Curious Case of Benjamin Button, starring Brad Pitt, is based on a short story by whom?

SOLUTION: the curious case of benjamin button

PROBLEM: Who became British Prime Minister in October 1922?

SOLUTION:
prime minister of the united kingdom