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 do muscles need to contract? Answer: stimulus

A: Muscles need stimulus to contract.
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Q: Question: Which of the following is an observation about grasshoppers that a science class could have made on their nature walk? Answer: The grasshoppers are green with long back legs and antennae.

A: The grasshoppers are green with long back legs and antennae of the following is an observation about grasshoppers that a science class could have made on their nature walk.
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Q: Question: What is the main component of milk? Answer: water

A:
Water is the main component of milk.
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