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".
--------
Question: Stephen believed it to be easy to please Kim.

Answer: acceptable


Question: A book was handed to Chris by Pat.

Answer: acceptable


Question: I'm sure that I ever met him.

Answer:
unacceptable