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".

The foxes seem compatible with the chickens.
acceptable

She speaks enough clearly to be understood.
unacceptable

I threw Mary the ball, but she was looking at the birds flying overhead and didn't even notice.

acceptable