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".

We believed there to try to leave the country.
unacceptable

Fred threw the ball under the porch.
acceptable

be eager to leave the meeting.

acceptable