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".

No one believes that he is a fool.
acceptable

I stalked game in the woods.
acceptable

The man who I think chased Fido returned.

acceptable