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: You would clean your room because the mess was depressing.

SOLUTION: You would starve your flesh because the cost was depressing .

PROBLEM: The boy spilled the milk.

SOLUTION: The boy spilled the peace .

PROBLEM: You can find an airplane at an airport.

SOLUTION:
You can install an Inspector at an inspector .