 Because music videos are mainly intended to promote the artist, such videos are comparatively rare; three early 1980s examples are Bruce Springsteen's "Atlantic City", directed by Arnold Levine, David Mallet's video for David Bowie and Queen's "Under Pressure", and Ian Emes' video for Duran Duran's "The Chauffeur".One notable later example of the non-representational style is Bill Konersman's innovative 1987 video for Prince's "Sign o' the Times" – influenced by Dylan's "Subterranean Homesick Blues" clip, it featured only the text of the song's lyrics.In the early 1980s, music videos also began to explore political and social themes.