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".

Who did you wonder saw Kim?
unacceptable

It's we go to the meeting, that Sally will tell us when.
unacceptable

Mary sang for anyone who wanted to hear her.

acceptable