Ключевые слова: african, african american, afro, audience, black, black man, conference, education, educator, event, glasses, gray hair, grey hair, hall, hands, indoor, intelligence, lecture, male, man, middle aged, moustache, one person, orange, people, presentation, professor, public speaking, scientist, seminar, speaker, stage, suit, talk, teaching, technology, ted, tedx, thought leader, training, university, workshop,