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".

My father, that he's lived here all his life is well-known to the cops.
acceptable

the branch dropped its apple free.
acceptable

We caught them eat the bananas.

unacceptable