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".

A choir sang in the church.
acceptable

Who do you wonder what bought?
unacceptable

John knows whose book Mary bought and Tom borrowed from her.

acceptable