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

Ex Input:
Who was British Prime Minister from 1922-23, shortly before he died?

Ex Output:
prime minister of the united kingdom


Ex Input:
The towns od Grimsby and Cleethorpes are in which English county?

Ex Output:
grimsby


Ex Input:
Around which war is `The Dirty Dozen` set?

Ex Output:

the dirty dozen