A man in gray uniform is cutting something on the ground while a man in white uniform is watching him.
The man in the white is the superior of the janitor in gray.
Wearing a gray uniform and cutting something on the ground doesn't necessarily mean the man is a janitor. Wearing white and watching the man in gray doesn't necessarily mean the other man is the superior.
he may not be the superior of the janitor
Man in gray is not necessarily janitor and watching someone cutting something on ground does not necessarily make him superior.