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 box gradually contained the ball.
unacceptable

The more people I ask what he will give to the more he reads.
unacceptable

One of the problems was the robins.

acceptable