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: That John passed surprised her, didn't it?

A: acceptable
****
Q: I am not certain about whether he will go or not.

A: acceptable
****
Q: Loren was relied on by Pavarotti and Hepburn by Bond.

A:
acceptable
****