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

Example Input: To which actress is Daniel Craig married?
Example Output: daniel craig

Example Input: The Ivy League University 'Dartmouth College' is in which US state?
Example Output: dartmouth college

Example Input: Who played 'Chandler Bing' in the US TV series 'Friends'?
Example Output:
friends