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 enjoy a film then you should rent a video.

SOLUTION: If you want to enjoy a guitar then you should rent a practice .

PROBLEM: Magazines contain many articles.

SOLUTION: Magazines contain obsolete articles .

PROBLEM: People who are trying to grow chickens will usually pull weeds .

SOLUTION:
People who are trying to become flowers will usually pull weeds .