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 harmless water vapor, for a powerplant? Answer: steam
[A]: Steam is harmless water vapor, for a powerplant.

[Q]: Question: Catecholamines are a class of amine hormones synthesised form which amino acid? Answer: tyrosine
[A]: Catecholamines are a class of amine hormones that when synthesised form the amino acid tyrosine.

[Q]: Question: What weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses? Answer: stationary front
[A]:
Stationary front weather phenomenon, which may bring clouds and precipitation, is created by stalled air masses.