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

Ex Input:
Brothers Richard and Simon Mantell played which sport for England in the 2010 Commonwealth Games?

Ex Output:
2010 commonwealth games

Ex Input:
The bells were ringing for Chuck Berry when this song made it to No1. His first and only British No. 1. What song?

Ex Output:
chuck berry

Ex Input:
Which British female swimmer won a silver medal at the 1980 Moscow Olympic Games for the 400 metre medley?

Ex Output:
silver medal