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 is the smallest unit of time commonly based on? Answer: second

A: Second is the smallest unit of time commonly based on.
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Q: Question: What type of winds occur when air is forced over a mountain range? Answer: chinook winds

A: Chinook winds occur when air is forced over a mountain range.
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Q: Question: Surface tension is responsible for the fact that small insects can do this on water? Answer: walk

A:
Surface tension is responsible for the fact that small insects can walk on water.
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