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".

Mary picked any of the flowers.
unacceptable

Ray found the outcome frustrating.
acceptable

Which celebrity did he mention the fact that he had run into?

unacceptable