TASK DEFINITION: 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".
PROBLEM: The employees staffed the store.

SOLUTION: acceptable

PROBLEM: I have some papers to try to finish grading.

SOLUTION: acceptable

PROBLEM: Despite of his limited educational opportunities, Abraham Lincoln became one of the greatest intellectuals in the world.

SOLUTION:
unacceptable