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

Example Input: Will you still be sending me a valentine is a line from which Beatles song?
Example Output: the beatles

Example Input: Which Beatle played Youngman Grand in The Magic Christian 1969, with Peter Sellers?
Example Output: the beatles

Example Input: What was the title of the first ever 'Carry On' film?
Example Output:
carry on