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: I saw him leaving the main building.

SOLUTION: acceptable

PROBLEM: Heidi gave a present to herself.

SOLUTION: acceptable

PROBLEM: How intelligent do you wonder whether I consider John?

SOLUTION:
unacceptable