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

Example Input: Who married Brooke Shields in 1997?
Example Output: brooke shields

Example Input: Name Alfred Hitchcock's first sound film as director?
Example Output: alfred hitchcock

Example Input: In which TV series does Anthony Head play Uther Pendragon?
Example Output:
uther pendragon