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.

[EX Q]: Question: Which part of the atmosphere do greenhouse gasses trap heat in? Answer: troposphere
[EX A]: Troposphere part of the atmosphere do greenhouse gasses trap heat in.

[EX Q]: Question: What does the esophagus produce for lubrication? Answer: mucous
[EX A]: Mucous does the esophagus produce for lubrication.

[EX Q]: Question: Is the heat of reaction positive or negative for an endothermic reaction? Answer: positive
[EX A]:
Is the heat of reaction for an endothermic reaction is positive.