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: Estradiol causes the endometrium to thicken during a menstrual cycle. Question: What causes the endometrium to thicken during a menstrual cycle?

A: estradiol
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Q: Sentence: The sporophyte phase is the longest phase in the life of a(n) gymnosperm. Question: The sporophyte phase is the longest phase in the life of what?

A: gymnosperm
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Q: Sentence: The lower density of warm air causes it to rise above cold air. Question: What property of warm air causes it to rise above cold air?

A:
lower density
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