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: John knows whose book Mary bought and Tom talked.

SOLUTION: unacceptable

PROBLEM: The man standing over there's hat impressed me greatly.

SOLUTION: acceptable

PROBLEM: It is this hat that I know the boy who is wearing.

SOLUTION:
unacceptable