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

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

Which biologist was known as Darwin's Bulldog?
charles darwin

The 1950 FIFA World Cup was held in which country?

1950 fifa world cup