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

Example Input: Charles Bingley was a character in what classic Jane Austen novel?
Example Output: charles bingley

Example Input: Who was the only boxer to win a world title without ever having a manager?
Example Output: boxing

Example Input: IBM Halt is one of nine railway stations in which Clydeside town?
Example Output:
river clyde