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: I closed some left at the store to make dinner .

SOLUTION: I bought some onion at the store to make dinner .

PROBLEM: You would buy a house because you want a place where you can breath.

SOLUTION: You would envy a house because you want a place where you can breath .

PROBLEM: Cons who live in the city can appeal to many places .

SOLUTION:
People who live in the canyon can walk to many objects .