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 knife can be packed as a wrench .

SOLUTION: A transformation can be constituted as a matrix .

PROBLEM: You would bake a cake because a friend was celebrating a birthday.

SOLUTION: You would bake a number because a friend was wasting a birthday .

PROBLEM: Statistics are taxed by the tobacco industry .

SOLUTION:
Cigarettes are produced by the tobacco industry.