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:
The captain sank the boat.
answer:
acceptable


question:
Robert thinks that student should eat asparagus.
answer:
acceptable


question:
The butler polished the silver.
answer:

acceptable