sentences:  Prior to forming its own cartoon studio, MGM released the work of independent animation producer Ub Iwerks, and later the "Happy Harmonies" series from Hugh Harman and Rudolf Ising.The MGM cartoon studio was founded to replace Harman and Ising, although both men eventually became employees of the studio.After a slow start, the studio began to take off in 1940 after its short "The Milky Way" became the first non-Disney cartoon to win the Academy Award for Best Short Subjects