TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which horse won the 2008 Grand National?

SOLUTION: 2008 grand national

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

SOLUTION: astronomer

PROBLEM: What is the SI unit of measurement for capacitance (defined as the ability of a body to store an electrical charge)?

SOLUTION:
capacitance