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 farm finally reached John after much litigation.

SOLUTION: unacceptable

PROBLEM: Who is it that Mary likes?

SOLUTION: acceptable

PROBLEM: He used to go there very often.

SOLUTION:
acceptable