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 often clip a tree in a suburban area .

SOLUTION: You often spray a tree in a suburban area .

PROBLEM: You are likely to find a work of art in a museum.

SOLUTION: You are likely to request a work of art in a collector .

PROBLEM: Cats sometimes like to toss grass .

SOLUTION:
Cats sometimes like to fetch grass .