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: Cats and dogs provoke each other .

SOLUTION: Cats and dogs call each other .

PROBLEM: You can accept or vary the lyrics of a song .

SOLUTION: You can audio or read the lyrics of a song .

PROBLEM: Turning to face the sun is a strategy.

SOLUTION:
Turning to give the ballot is a follow .