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

Ex Input:
What American swimmer won eight gold medals at the 2008 Olympics?

Ex Output:
2008 summer olympics


Ex Input:
To which country do the Chatham Islands belong?

Ex Output:
chatham islands


Ex Input:
Bye Bye Love in 1957 was the first hit single for which duo?

Ex Output:

bye bye love