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

Ex Input:
Feb 15, 1564 saw the birth of what famed Italian physicist, mathematician, astronomer, and philosopher, who discovered the first 4 moons of Jupiter?

Ex Output:
astronomer


Ex Input:
Which British Prime Minister delivered the 'Winds of Change' speech in 1960?

Ex Output:
wind of change


Ex Input:
Which fictional 'super heroine' is the alter-ego of Barbara Gordon?

Ex Output:

barbara gordon