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: Children pick to play in large cardboard boxes .

SOLUTION: Children love to wash in large cardboard boxes .

PROBLEM: You are likely to find a football stash in an envelope .

SOLUTION: You are sorry to find a th parcel in an envelope .

PROBLEM: The reality of seeing your lame show is laughter .

SOLUTION:
The adventure of seeing your real show is laughter .