TASK DEFINITION: In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
PROBLEM: Sentence: Fire extinguisher of the following items is necessary in a laboratory for safety purposes. Question: Which of the following items is necessary in a laboratory for safety purposes?

SOLUTION: Fire extinguisher

PROBLEM: Sentence: Leaves changing color on trees of these is the best sign that the fall season has begun. Question: Which of these is the BEST sign that the fall season has begun?

SOLUTION: Leaves changing color on trees

PROBLEM: Sentence: The epicenter is the center of an earthquake called. Question: What is the center of an earthquake called?

SOLUTION:
the epicenter