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: Solar and wind are still expensive compared to fossil fuels. Question: Solar and wind are still expensive compared to what?
[A]: fossil fuels


[Q]: Sentence: Water plus other substances makes a(n) solution. Question: Water plus other substances makes what?
[A]:
solution