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

Ex Input:
What breed of dog is Marmaduke in the newspaper cartoon strip of that name?

Ex Output:
dog


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

Ex Output:
british army


Ex Input:
Which British pop group appeared in the 1965 film 'Catch Us If You Can'?

Ex Output:

catch us if you can