TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Christopher Eccleston, Kerry Fox and Ewan McGregor played flatmates in which 1994 film?

SOLUTION: christopher eccleston

PROBLEM: Chris Difford and Glenn Tilbrook founded which band in 1974?

SOLUTION: chris difford

PROBLEM: Who was British Prime Minister from 1902 to 1905 ?

SOLUTION:
prime minister of the united kingdom