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: She held him by the arm.

SOLUTION: acceptable

PROBLEM: John is taller than Bill.

SOLUTION: acceptable

PROBLEM: What does John wonder Mary bought?

SOLUTION:
unacceptable