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 can use a zoom lens to take a close-up picture of a bird.

SOLUTION: You can use a zoom plugin to take a close - up picture of a pen .

PROBLEM: If you want to write a poem then you should use a pen.

SOLUTION: If you want to stitch a poem then you should use a dictionary .

PROBLEM: A dragon is a big, scary, fire-breathing make-believe beast.

SOLUTION:
A dragon is a big , scary , fire - breathing predator - believe beast .