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: John offers few advice.

A: unacceptable
****
Q: I've seen as much of a coward as Frank.

A: unacceptable
****
Q: Joan plays and sings folk songs a wonderful old guitar from Spain.

A:
unacceptable
****