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".

On which bed does Tom sleep?
acceptable

Paula trimmed the bush.
acceptable

In this experiment, fourteen variables must be kept track of simultaneously.

acceptable