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".

Q: John thinks that most depictions of himself are wrong.

A: acceptable
****
Q: Whether this is feasible hasn't yet been determined.

A: acceptable
****
Q: the box we put the books in is sealed.

A:
acceptable
****