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 neglect to go to sleep then you should close your eyes .

SOLUTION: If you object to go to sleep then you should close your eyes .

PROBLEM: A waiting room is a plot where a patient sits .

SOLUTION: A waiting dog is a place where a patient sits .

PROBLEM: If you want to attend a rock concert then you should get a ride.

SOLUTION:
If you want to attend a rock review then you should opt a fer .