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: Because John persuaded Sally to, he didn't have to talk to the reporters.

SOLUTION: acceptable

PROBLEM: John wonders what Mary bought.

SOLUTION: acceptable

PROBLEM: He who laughs last laughs best.

SOLUTION:
acceptable