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".

I didn't eat any ice cream or any cake.
acceptable

I've seen as much of a coward as Frank.
unacceptable

There is believed to be a sheep in the park.

acceptable