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

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

Output: doctor who


Input: Consider Input: With what sport is Dennis Compton associated?

Output: denis compton


Input: Consider Input: Which American band had hits with Bad Moon Rising and Proud Mary?


Output: proud mary