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: The cranium (skull) protect(s) the brain. Question: What part of the body protects the brain?

SOLUTION: cranium (skull)

PROBLEM: Sentence: The speed of sound depends on medium. Question: The speed of sound depends on what?

SOLUTION: medium

PROBLEM: Sentence: Precambrian mass extinction was the first mass extinction that occurred on earth. Question: What was the first mass extinction that occurred on earth?

SOLUTION:
precambrian mass extinction