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.

[EX Q]: Sentence: Most of food's chemical energy ultimately comes from sunlight. Question: Most of food's chemical energy ultimately comes from what source?
[EX A]: sunlight

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

[EX Q]: Sentence: Continents are unable to be pushed down into the mantle by plate boundaries because of buoyancy. Question: Why are continents unable to be pushed down into the mantle by plate boundaries?
[EX A]:
buoyancy