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 that Bill is is generally believed.
[A]: unacceptable


[Q]: It is the folks up at corporate headquarters who the sooner you solve this problem, the more easily you'll satisfy.
[A]: unacceptable


[Q]: The chicken was eaten.
[A]:
acceptable