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

Example Input: Auld Reekie is the nickname for which Scottish city?
Example Output: auld reekie

Example Input: Which film was based on the story The Sentinel by Arthur C Clarke?
Example Output: arthur c. clarke

Example Input: In which book would you find the Cheshire Cat?
Example Output:
cheshire cat