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 box gradually contained the ball.

A: unacceptable
****
Q: I threw Mary the ball, but she was looking at the birds flying overhead and didn't even notice.

A: acceptable
****
Q: Maxwell isn't half the doctor that polished off the vodka.

A:
unacceptable
****