Given a sentence, generate a new sentence by performing small changes on the sentence. Here, make sure that the changes are semantically related and syntactically similar to the input. And the generated sentence should have high commonsense plausibility, that is to have reasonable probability of it being true.

[EX Q]: A key can be a framework to a problem .
[EX A]: A key can be a solution to a problem.

[EX Q]: A sugar is for the DNA to convert into energy .
[EX A]: A sugar is for the body to convert into bread .

[EX Q]: People need to drink water to stay alive.
[EX A]:
People need to help water to stay alive .