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: Susan will never sing at weddings.

SOLUTION: acceptable

PROBLEM: My father, that he's lived here all his life is well-known to the cops.

SOLUTION: acceptable

PROBLEM: The prudish linguist didn't enjoy looking at the internet.

SOLUTION:
acceptable