In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: The average global temperature has been rising since the end of what era? Answer: pleistocene

A: The average global temperature has been rising since the end of pleistocene era.
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Q: Question: Lipids are available to the body from how many sources? Answer: three

A: Lipids are available to the body from three sources.
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Q: Question: What shape is the lens of the eye? Answer: convex

A:
The lens of the eye is a(n) convex shape.
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