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 insist on seeing through all the students who had started out the term in my class.
unacceptable

One of the problems was the robins.
acceptable

The more people that arrive, the louder it gets.

acceptable