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

Example Input: In 2012 , who became the first woman writer to win the Booker Prize for the second time ?
Example Output: man booker prize

Example Input: Who directed the film `Back To The Future`?
Example Output: back to the future

Example Input: Which actor appeared in the most 'Carry On' films?
Example Output:
carry on