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: The epidermis of a leaf contains openings known as stomata, through which the exchange of gases takes place. Question: Which part of a leaf contains openings known as stomata, through which the exchange of gases takes place?
[A]: epidermis


[Q]: Sentence: The energy stored in the organic molecules of food ultimately comes from the sun. Question: The energy stored in the organic molecules of food ultimately comes from where?
[A]: sun


[Q]: Sentence: The seven unique crystal types are defined by faces parts of themselves (parts that intersect at various angles). Question: The seven unique crystal types are defined by what parts of themselves (parts that intersect at various angles)?
[A]:
faces