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: Who do you think that Mary said that John likes?

SOLUTION: acceptable

PROBLEM: The little cat devoured a mouse last night.

SOLUTION: acceptable

PROBLEM: She thought it was easy for everyone would fit into the car.

SOLUTION:
unacceptable