Ключевые слова: advertisement, advertising, alarm, alert, announce, announcement, attention, attention sign, beware, broadcast, careful, communication, concept, danger, error, exclamation, hazard, help, importance, important, info, information, loud, message, news, notification, pay attention, please, priority, problem, public, report, risk, safe, safety, secure, security, shout, sound, speech, stop, symbol, urgent, very important, voice, warn, warning,