instruction:
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.
question:
Sentence: Most of food's chemical energy ultimately comes from sunlight. Question: Most of food's chemical energy ultimately comes from what source?
answer:
sunlight


question:
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?
answer:
acid


question:
Sentence: The number of particles of a substance in a given volume is known as the concentration. Question: The number of particles of a substance in a given volume is known as?
answer:

concentration