Ключевые слова: abstract, audience, background, blur, blurred, blurry, boardroom, bokeh, business, busy, chair, class room, classroom, computer, concept, conference, corporate, crowded, crowds, defocused, disorganized, educate, education, event, events, focus, fun, group, interior, laptop, lecture, lecturer, lighting, lights, listening, multimedia, notebook, people, presentation, professional, room, scene, seminar, sit, speaker, spotlight, students, training,