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".

The cages which we donated wire for the convicts to build with are strong.
unacceptable

A book was handed to Chris by Pat.
acceptable

I would prefer that he have not finished.

unacceptable