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.
--------
Question: Sentence: Turbulent atmosphere does neptune's appearance change. Question: Why does neptune's appearance change?

Answer: turbulent atmosphere


Question: Sentence: Heart disease is the leading cause of death in the united states. Question: What is the leading cause of death in the united states?

Answer: heart disease


Question: Sentence: Amines are weak bases due to the presence of a lone pair of electrons on the nitrogen atom. Question: Amines are weak bases due to the presence of a lone pair of what on the nitrogen atom?

Answer:
electrons