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

Example Input: Who choreographed the ballets Swan Lake and Don Quixote, among others?
Example Output: don quixote

Example Input: Denzil Washington played which black militant leader in the 1992 film of the same name?
Example Output: denzel washington

Example Input: Who was Big Ben named after?
Example Output:
big ben