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: If he has to wait, John gets angry.

Answer: acceptable


Question: The branches knocked against the wall.

Answer: acceptable


Question: It is crucial that John should show an interest.

Answer:
acceptable