In 1882, French inventor Louis Lumière developed a method of making photographic plates. By 1894, he and his brother August were producing 15 million plates a year. They worked on improving Edison’s kinetoscope, and, in 1895, patented their combination movie camera and projector, the Cinématographe. Their 46-second film La Sortie des ouvriers de l’usine Lumière is considered the first motion picture and was one of 10 included in their first public film screening. What is its subject? Discuss
Source: The Free Dictionary