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]: the pencil with that he is writing broke.
[A]: unacceptable


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


[Q]: Sarah sang the anthem.
[A]:
acceptable