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: If you want to have a party then you should buy snacks and drinks.

SOLUTION: If you want to have a party then you should buy fish and drinks .

PROBLEM: Cats and dogs provoke each other .

SOLUTION: Cats and dogs call each other .

PROBLEM: You can use a pool to have a pool party.

SOLUTION:
You can flood a pool to have a pool party .