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".

[EX Q]: Every student in Mary's class is working on negative polarity.
[EX A]: acceptable

[EX Q]: The papers removed from the safe have not been found.
[EX A]: acceptable

[EX Q]: George has went to America.
[EX A]:
unacceptable