Ключевые слова: adult, alert, attention, background, ban, banner, blue, boy, casual, caucasian, caution, concept, control, crisis, danger, decline, demonstrating, direction, expression, face, front, gesture, guy, hand, holding, icon, limits, male, man, negative, no, octagon, people, person, prevention, prohibition, red, reject, rejection, risk, road, showing, shows, sign, signal, standing, stop, symbol, traffic, warning,