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:
Carol cut her thumb.
answer:
acceptable


question:
Robert knows it is essential that he is well behaved.
answer:
acceptable


question:
The car had a yellow collar on the dog which it injured.
answer:

unacceptable