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

Ex Input:
Who was the scheming wife of the Roman emperor Claudius?

Ex Output:
claudius


Ex Input:
Who is the current Australian prime minister ?

Ex Output:
australia


Ex Input:
Who won 3 gold medals for Great Britain at the 2008 Summer Olympics, and was named 2008 BBC Sports Personality of the Year?

Ex Output:

britain