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: A child can smell a flower.

SOLUTION: A child can smell a blood .

PROBLEM: If you want to switch cash then you should have the underlying change .

SOLUTION: If you mind to pay cash then you should have the right proof .

PROBLEM: You drink coffee from a cup.

SOLUTION:
You expect coffee from a CEO .