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

Ex Input:
Chelsea won the 2009 FA Cup final 2-1.  Who were the beaten finalists?

Ex Output:
2009 fa cup final


Ex Input:
Grace Anna Goodhue was the wife of which US President?

Ex Output:
grace coolidge


Ex Input:
Who are Athos, Porthos, and Aramis?

Ex Output:

athos