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

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

Ex Output:
british army

Ex Input:
In March 1992 'Deeply Dippy' was the only number one hit for which group?

Ex Output:
deeply dippy

Ex Input:
Who portrays Kara Tointon in TV's Eastenders?

Ex Output:
eastenders