Teacher: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Who was the first American President?
Solution: president of the united states
Reason: The question talks about the president of the USA.

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