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".

John is prouder of having gone than I expected you to believe he would be of not having fallen asleep.
acceptable

Mary questioned Joe's desire to eat cabbage, but only after I had questioned Sally's desire to.
unacceptable

A solution presented itself yesterday.

acceptable