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".

When did you get back and what did you bring me?
acceptable

They let him go yesterday, he.
unacceptable

The committee haven't yet made up their mind.

acceptable