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".

Paula swatted the cloth on the fly.
unacceptable

They let him go yesterday, he.
unacceptable

There are seven pine trees behind that barn.

acceptable