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: The boy whose guardian's we elected employer president betrayed us.

A: unacceptable
****
Q: John seems know about the bananas.

A: unacceptable
****
Q: That the sun is out was obvious.

A:
unacceptable
****