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

Example Input: Who directed the 2005 film 'Brokeback Mountain'?
Example Output: brokeback mountain

Example Input: Christian Grey is a character in what recent book trilogy?
Example Output: christian grey

Example Input: Albany is the capital of which American state?
Example Output:
albany, new york