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 sign a contract because you want to restore a house .

SOLUTION: You would sign a contract because you want to buy a house.

PROBLEM: Losing your pathetic love would make you swear to commit suicide .

SOLUTION: Losing your toxic love would make you strive to commit suicide .

PROBLEM: You can use a bucket to enjoy the lake of salty air .

SOLUTION:
You can use a sea to enjoy the smell of salty heaven .