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 boy whose guardian's we elected employer president betrayed us.
unacceptable

It was with a great deal of regret that I vetoed your proposal.
acceptable

This is the student pictures of whom appeared in the newspaper.

acceptable