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

Example Input: Mr Barkis, Edward Murdstone and Tommy Traddles are all characters in which Charles Dickens novel?
Example Output: charles dickens

Example Input: The French wine growing areas of Macon, Beaujolais and Chablis are in which region?
Example Output: macon

Example Input: From which football club did Arsenal sign midfielder Cesc Fabregas?
Example Output:
cesc fabregas