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

Ex Input:
Which pop group consisted of Huw Bunford, Clan Caren, Dafydd Leuan, Guto Price and Gryff Rhuys?

Ex Output:
huw bunford


Ex Input:
Which English king was the son of Edward, the Black Prince?

Ex Output:
edward, the black prince


Ex Input:
Which Briton won three Gold Olympic medals in the 2008 Summer Olympics?

Ex Output:

2008 summer olympics