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: People can relax by sitting and watching the market .

SOLUTION: People can relax by rolling and talking the ocean .

PROBLEM: You would eat ice cream because you are depressed.

SOLUTION: You would change ice cream because you are depressed .

PROBLEM: My car breaking down would make you want to clear the apartment .

SOLUTION:
My car breaking down would make you swear to take the bus .