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: If you presume to start a fire then you should light a match .

SOLUTION: If you urge to continue a fire then you should light a warning .

PROBLEM: A very good class would destroy you want to see a particular map .

SOLUTION: A very good review would make you forget to rank a particular program .

PROBLEM: You can use a landing to descend out of the strat .

SOLUTION:
You can post a landing to get out of the sky .