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

Example Input: What is the official language of the Dominican Republic?
Example Output: dominican republic

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

Example Input: Who plays Dr John Becker in the US television series 'Becker'?
Example Output:
becker