Motion pictures are recognized as "the most powerful medium for educating the masses" and play a central role in social education. According to a North Korean source, "films for children contribute to the formation of the rising generation, with a view to creating a new kind of man, harmoniously evolved and equipped with well-founded knowledge and a sound mind in a sound body." One of the most influential films, "An Jung-geun Shoots Ito Hirobumi", tells of the assassin who killed the Japanese resident-general in Korea in 1909. An is depicted as a courageous patriot, but one whose efforts to liberate Korea were frustrated because the masses had not been united under "an outstanding leader who enunciates a correct guiding thought and scientific strategy and tactics." Folk tales such as "The Tale of Chun Hyang", about a nobleman who marries a servant girl, and "The Tale of On Dal" have also been made into films.