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 harder it rains, how much faster a flow do you see in the river?
acceptable

I went to the movies not to pick the shirts up.
unacceptable

Linda taped the box with two-sided tape.

acceptable