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

Example Input: Charon is a moon which orbits which body?
Example Output: charon

Example Input: Which poem by Keats and novel by Disraeli both have the same title?
Example Output: john keats

Example Input: In which 2006 film does Mark Wahlberg try out for a University American Football team?
Example Output:
american football