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".

My mother baked me a birthday cake.
acceptable

I detached that new handle from the box.
acceptable

That he sometimes went there alone is certain.

acceptable