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.

[Q]: Sentence: One of the main features all vetebrates have in common is a backbone. Question: One of the main features all vetebrates have in common is what?
[A]: backbone


[Q]: Sentence: Turbulent atmosphere does neptune's appearance change. Question: Why does neptune's appearance change?
[A]: turbulent atmosphere


[Q]: Sentence: Because of their reactivity, we do not find most representative metals as free elements in nature. Question: Because of their reactivity, we do not find most representative metals as free elements where?
[A]:
in nature