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

Example Input: Who died of a burst appendix after being punched in the stomach?
Example Output: appendicitis

Example Input: Who is the current Australian prime minister ?
Example Output: australia

Example Input: Chris Difford and Glenn Tilbrook founded which band in 1974?
Example Output:
chris difford