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

Ex Input:
What was the name of Chuck Berry`s 1972 hit which gave him his first number one?

Ex Output:
chuck berry


Ex Input:
Where is the Barbary Coast?

Ex Output:
barbary coast


Ex Input:
In which English city is the Don Valley Stadium?

Ex Output:

don valley stadium