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: Mutation is essential in order for evolution to occur because it increases genetic variation and the potential for individuals to differ. Question: What phenomenon is essential in order for evolution to occur because it increases genetic variation and the potential for individuals to differ?
[EX A]: mutation

[EX Q]: Sentence: Is the heat of reaction for an endothermic reaction is positive. Question: Is the heat of reaction positive or negative for an endothermic reaction?
[EX A]: positive

[EX Q]: Sentence: Magma comes toward earth's crust through mantle plumes. Question: What substance comes toward earth's crust through mantle plumes?
[EX A]:
magma