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".

Every student in Mary's class is working on negative polarity.
acceptable

Jennifer swatted Steve.
acceptable

We like our friends and they do too.

acceptable