Ключевые слова: academic, academy, audience, black and white, blue, business, business people, businessman, coaching, conference, conference hall, congress, convention, convention center, corporate, education, educator, entrepreneur, entrepreneurship, event, explaining, faculty, greyscale, institute, leader, lecture, lecture hall, listeners, man, manager, media, meeting, participants, people, presentation, professional, public, screen, seminar, speaker, speech, startup, summit, symposium, talk, teacher, teaching, training, university, workshop,