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]: The five `` soundscape '' pieces gave a festive air to Park Square.
[EX A]: acceptable

[EX Q]: Whenever Bill smokes, Susan hates him far more.
[EX A]: acceptable

[EX Q]: John is believed to be certain by everyone that Fred is crazy.
[EX A]:
unacceptable