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 are easy to find a bush in a forest .

SOLUTION: You are likely to find a mouse in a forest.

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: People can be registered .

SOLUTION:
Neither can be friends .