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 Renaissance artist's life was fictionalised in the book 'The Agony and the Ecstasy' subsequently made into a film?

SOLUTION: the agony and the ecstasy

PROBLEM: Which Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?

SOLUTION: chris kyle

PROBLEM: Which of these ACDC albums was released first?

SOLUTION:
ac/dc