Ключевые слова: anonymous, audience, background, blur, blurred, business, businessman, busy, city, conference, congress, convention, corporate, crowd, crowded, day, delegates, diversity, education, event, forum, group, hall, human, indoors, large, lecture, manager, many, men, outdoor, outside, overcrowded, overpopulation, owercrowding, participants, passenger, pedestrians, people, population, presentation, seminar, training, transportation, urban, visitor, walk, women,