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".

With their teacher, the kids have arrived safely, hasn't he?
unacceptable

Smith inscribed the ring with his name.
acceptable

Every man who said he would buy some salmon did buy some salmon.

acceptable