Ключевые слова: 30s, 50s, applauding, applause, attending, business, businessman, businessmen, businesswoman, businesswomen, casual clothing, caucasian, ceo, clapping, conference, delegate, female, fifties, group, happy, horizontal, leadership, lecture, listening, male, man, men, middle aged, people, person, presentation, sitting, smiling, thirties, woman, women,