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: Cells come from preexisting cells. Question: Where do cells come from?
[A]: preexisting cells


[Q]: Sentence: Property to time kind of variation does a rate measure. Question: What kind of variation does a rate measure?
[A]: property to time


[Q]: Sentence: Multiple genes mutations is usually necessary to develop cancer. Question: What is usually necessary to develop cancer?
[A]:
multiple genes mutations