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: John seems know about the bananas.

SOLUTION: unacceptable

PROBLEM: Have in our class the kids arrived safely?

SOLUTION: unacceptable

PROBLEM: The latest research on dieting always warns people about the dangers of too much cholesterol.

SOLUTION:
acceptable