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]: Carla mopped under the furniture.
[EX A]: acceptable

[EX Q]: The tuna must have been eaten.
[EX A]: acceptable

[EX Q]: There is believed to be a dragon in the wood.
[EX A]:
acceptable