TASK DEFINITION: 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.
PROBLEM: The boy spilled the milk.

SOLUTION: The boy spilled the peace .

PROBLEM: You would hold a release because you are veteran of a band .

SOLUTION: You would play a guitar because you are part of a band.

PROBLEM: It is nice to take a walk in the sunshine.

SOLUTION:
It is early to fall a smile in the sunshine .