Once upon a time…

A crowd of people walks in front of a building with a sign reading "МОСКВОРЕЦКИЙ УНИВЕРСИТЕТ" (Moscow River University), while a man in a uniform walks across the foreground. A man in a work uniform operates a lathe machine, focusing on the metal workpiece. A teacher and a student stand in front of a blackboard with a physics diagram, with the teacher observing the student. A female teacher stands at the front of a classroom, addressing a group of young female students seated at desks. A group of children play in a schoolyard, with a building and trees in the background. A dark object flies th