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]: Fluffy is sick, which nobody knows.
[A]: acceptable


[Q]: My father, that he's lived here all his life is well-known to the cops.
[A]: acceptable


[Q]: Nixon's behavior gave an idea for a book to every journalist living in New York City in the 1970s.
[A]:
acceptable