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:
him belief that Mary kissed Bill is mistaken.
answer:
unacceptable


question:
An oak tree will grow from that acorn.
answer:
acceptable


question:
Exactly half of the students attended some seminar.
answer:

acceptable