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".

I bought the parrot in the store.
acceptable

Sam may have been being interrogated by the FBI.
acceptable

I lent the book most of the way to Tony.

unacceptable