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

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

[EX Q]: Who was the only boxer to win a world title without ever having a manager?
[EX A]: boxing

[EX Q]: Established in 1919, which is the world's oldest surviving airline?
[EX A]:
airline