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.

[Q]: Sentence: Muscles need stimulus to contract. Question: What do muscles need to contract?
[A]: stimulus


[Q]: Sentence: Many plants respond to the days growing shorter in the fall by going dormant. Question: Many plants respond to the days growing shorter in the fall by doing what?
[A]: going dormant


[Q]: Sentence: Ice wedging occurs because water expands. Question: Why does ice wedging occur?
[A]:
water expands