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 election results surprised everybody.
acceptable

Where did the policeman meet several young students?
acceptable

Ivan got a headache on Wednesday from the disgruntled students of phonology from Michigan.

acceptable