TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Cilantro is the leaf of which herb?

SOLUTION: cilantro

PROBLEM: Which Union leader of the American Civil War gave his name to a tree in California's 'Sequoia National Park'?

SOLUTION: american civil war

PROBLEM: Summer of the Seventeenth Doll, a 1955 play by Ray Lawler, is set in Carlton, a suburb of what city?

SOLUTION:
carlton