Their first film, the innovative A Hard Day's Night (1964), was received enthusiastically by a wide audience that included many who had never before listened to rock music. Composing their own material (Lennon and McCartney were the major creative forces),The Beatles established the precedent for other rock groups to play their own music. Experimenting with new musical forms, they produced an extraordinary variety of songs: the childishly simple "Yellow Submarine"; the bitter social commentary of "Eleanor Rigby"; parodies of earlier pop styles; new electronic sounds; and compositions that were scored for cellos, violins, trumpets, and sitars, as well as for conventional guitars and drums. Some enthusiasts cite the albums Rubber Soul (1965) and Revolver (1966) as the apex of Beatle art, although Sergeant Pepper's Lonely Hearts Club Band (1967), perhaps the first rock album designed thematically as a single musical entity, is more generally considered their triumph. The group disbanded in 1970, after the release of their final album, Let It Be, to pursue individual careers. On Dec. 8, 1980, John Lennon was fatally shot in New York City. In 1991, Paul McCartney's classical composition Liverpool Oratorio was performed to some acclaim in Britain and the United States.