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".

[Q]: Willy is taller than Bill by as much as I know a boy who thinks that Bill is taller than Dan.
[A]: unacceptable


[Q]: The thief stole Mr. Smith the painting.
[A]: unacceptable


[Q]: The belief that syntactic theory reveals the inner structure of sentences emboldened the already much too cocky professor.
[A]:
acceptable