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.

[EX Q]: Sentence: The ears are an external feature in human beings is responsible for balance. Question: What external feature in human beings is responsible for balance?
[EX A]: ears

[EX Q]: Sentence: Certain air pollutants form acid liquid when dissolved in water droplets in the air. Question: Certain air pollutants form which liquid when dissolved in water droplets in the air?
[EX A]: acid

[EX Q]: Sentence: In harmonic motion there is always restorative force force, which acts in the opposite direction of the velocity. Question: In harmonic motion there is always what force, which acts in the opposite direction of the velocity?
[EX A]:
restorative force