Ключевые слова: abstract, adult, audience, background, blur, blurred, boardroom, business, businessman, closeup, conference, conferences, congress, convention, corporate, crowd, design, education, event, female, group, hall, international, learn, lecture, light, meeting, men, modern, people, person, photo, podium, presentation, professional, public, room, seminar, smartphone, speaker, speaking, speech, team, training, white, woman,