Ключевые слова: african, african american, american, black, book, boy, business, caucasian, child, class, classroom, college, concept, coronavirus, education, elementary, elementary student, extinguisher, female, fire, fire extinguisher, firefighter, fireman, girl, kid, knowledge, learn, learning, lesson, male, man, medium group of people, mixedrace, multiracial, people, protection, safety, school, security, student, study, studying, symbol, teacher, teaching, unaltered, university, virus, young, young adult, young male,