Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

[EX Q]: Which Dickens novel is subtitled The Parish Boy's Progress?
[EX A]: charles dickens

[EX Q]: The bells were ringing for Chuck Berry when this song made it to No1. His first and only British No. 1. What song?
[EX A]: chuck berry

[EX Q]: Which nineteenth century conflict is the background to the novel 'Cold Mountain' by Charles Frazier?
[EX A]:
cold mountain