TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which Indian city is Eden Gardens, the second largest test cricket ground in the world?

SOLUTION: eden gardens

PROBLEM: What is the SI unit of capacitance?

SOLUTION: capacitance

PROBLEM: Broken Arrow, Edmond, Enid, Lawton, Midwest City, Moore, Norman, Stillwater and Tulsa are 9 of the 10 largest cities in which state of the USA?

SOLUTION:
edmond, oklahoma