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: It is this hat that it is certain that he was wearing.

A: acceptable
****
Q: John can to kick the ball.

A: unacceptable
****
Q: Because she's so pleasant, Mary I really like her.

A:
unacceptable
****