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

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

A: astronomer
****
Q: Where on Prince Edward Island, Canada, is Anne of Green Gables located?

A: canada
****
Q: What is the largest city on Alabama's Gulf Coast?

A:
alabama
****