You're given a sentence and your task is to classify whether the sentence is acceptable or not. Any sentence which is grammatically correct, has a naturalistic text, is written by a native speaker and which minimizes superfluous content is acceptable, otherwise unacceptable. If the sentence is acceptable then write "acceptable", otherwise "unacceptable".

[Q]: Mary's happy with her work, and John's with his children.
[A]: acceptable


[Q]: He never achieved anything, didn't he?
[A]: unacceptable


[Q]: These stories about himself describe John better than any official biography.
[A]:
unacceptable