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 value an art gallery because you want to see the art .

SOLUTION: You would visit an art gallery because you want to see the art.

PROBLEM: The iber rises once a tree .

SOLUTION: The sun rises once a day.

PROBLEM: The iber rises once a tree .

SOLUTION:
The sun rises once a day.