 Complete the following phrase:  McCay was an early animation pioneer; between 1911 and 1921 he self-ficed and animated ten films, some of which survive only as fragments. The first three served in his vaudeville act; Gertie the Dinosaur was an interactive routine in which McCay appeared to give orders to a trained dinosaur. McCay and his assistants worked for twenty-two months on his most ambitious film, The Sinking of the Lusitania 1918, a patriotic recreation of the 