instruction:
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".
question:
I am not certain about whether he will go or not.
answer:
acceptable


question:
Was the child in the school?
answer:
acceptable


question:
Tom denied which book he had been reading.
answer:

unacceptable