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.

[EX Q]: An x is used for communicating through the postal system .
[EX A]: An envelope is used for reading through the postal system .

[EX Q]: Some ducks swim in the water .
[EX A]: Some birds remain in the water .

[EX Q]: If you want to se warm then you should open the air condition .
[EX A]:
If you want to get warm then you should open the air condition.