In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Proteins are long chains of amino acids. Question: What are long chains of amino acids?
proteins

Sentence: The composition of the atmosphere has changed over the last 200 years primarily due to human activity. Question: Which of the following has changed over the last 200 years primarily due to human activity?
the composition of the atmosphere

Sentence: Mucous does the esophagus produce for lubrication. Question: What does the esophagus produce for lubrication?

mucous