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 want to downgrade to a W then you should have a check .

SOLUTION: If you want to go to a family then you should have a birthday .

PROBLEM: Children pick to play in large cardboard boxes .

SOLUTION: Children love to wash in large cardboard boxes .

PROBLEM: You are likely to find an acoustic ceiling in the opera house.

SOLUTION:
You are likely to find an acoustic rug in the opera house .