Ключевые слова: aged, anonymous, attention, audience, auditorium, back view, blurred background, business, businessman, communicate, conference, conversation, copy space, crowd, director, elderly, entrepreneur, event, explain, faceless, gray hair, horizontal, indoors, leader, meeting, participant, participate, people, presentation, professional, public, seminar, senior, speak, speaker, speech, stage, suit, talk, unrecognizable, well dressed,