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

Example Input: Of all the actors who played Doctor Who in the TV series of the same name, who appeared in the most episodes?
Example Output: doctor who

Example Input: The 1987 film 'Roxanne' was adapted by actor Steve Martin from which Edmond Rostand play?
Example Output: roxanne

Example Input: Which rugby union club play their home games at Adams Park?
Example Output:
adams park