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: Magazines contain many articles.

SOLUTION: Magazines contain obsolete articles .

PROBLEM: You can use the sky to test an airplane opposite the eye .

SOLUTION: You can use the service to berth an airplane across the platform .

PROBLEM: The effect of starting a contest or a fire is for romantic parties .

SOLUTION:
The promise of starting a flame or a fire is for romantic evenings .