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: Carla mopped under the furniture.

A: acceptable
****
Q: An oak tree will grow from that acorn.

A: acceptable
****
Q: I know I bought the book that you recommended.

A:
acceptable
****