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

Example Input: In which book of the Bible are the Ten Commandments first mentioned?
Example Output: bible

Example Input: Who wrote the 1939 book The Big Sleep?
Example Output: the big sleep

Example Input: Who played Heinrich Himmler in the 1976 film 'The Eagle Has Landed'?
Example Output:
the eagle has landed