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: A blanket can be covering a bed.

SOLUTION: A Man can be washing a bed .

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: If you want to enhance software then you should learn to program computers .

SOLUTION:
If you want to classify software then you should rewrite to program computers .