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".

[EX Q]: It appears to be true that Harry likes girls.
[EX A]: acceptable

[EX Q]: Have in our class the kids arrived safely?
[EX A]: unacceptable

[EX Q]: He's the happiest that I believe that he's ever been.
[EX A]:
acceptable