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: Stephen believed the cat to be out of the bag.

SOLUTION: acceptable

PROBLEM: The richer John gets, the more geniuses John meets.

SOLUTION: acceptable

PROBLEM: During the early evening, Saturn can be found in the north, while Jupiter rises in the east.

SOLUTION:
acceptable