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

Ex Input:
Who won a Gold Medal for Britain in the men's 100 metres at the 1992 Summer Olympic Games in Barcelona?

Ex Output:
britain


Ex Input:
What is the Army equivalent to a Group Captain in the R.A.F.?

Ex Output:
british army


Ex Input:
The 'Black Paintings' is the name given to a group of paintings by which Spanish artist?

Ex Output:

black paintings