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

Example Input: Which Dickens novel is subtitled The Parish Boy's Progress?
Example Output: charles dickens

Example Input: According to folklore, what was the name of the monster slain by 'Beowulf'?
Example Output: beowulf

Example Input: Intensive British forces operations in Afghanistan through 2007 were centred in which province?
Example Output:
afghanistan