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: What form when water vapor condenses in the air around specs of matter? Answer: clouds

A: Clouds form(s) when water vapor condenses in the air around specs of matter.
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Q: Question: What do you call the pattern of lines formed when light passes through a prism to separate it into the different frequencies of light it contains? Answer: atomic emission spectrum

A: Atomic emission spectrum do you call the pattern of lines formed when light passes through a prism to separate it into the different frequencies of light it contains.
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Q: Question: Which of these is the BEST sign that the fall season has begun? Answer: Leaves changing color on trees

A:
Leaves changing color on trees of these is the best sign that the fall season has begun.
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