Marcel Duchamp (pronounced [maʀsɛl dyˈʃɑ̃]) (28 July 1887 – 2 October 1968) was a French artist whose work is most often associated with the Dadaist and Surrealist movements. Duchamp's output had considerable influence on the development of post-World War I Western art, and whose advice to modern art collectors helped shape the tastes of the Western art world. <br /><br />A playful man, Duchamp prodded thought about artistic processes and art marketing, not so much with words, but with actions such as dubbing a urinal "art" and naming it Fountain. He produced relatively few artworks as he quickly moved through the avant-garde rhythms of his time. <br /><br />The creative act is not performed by the artist alone; the spectator brings the work in contact with the external world by deciphering and interpreting its inner qualifications and thus adds his contribution to the creative act. <br />Maya Deren (April 29, 1917, Kiev – October 13, 1961, New York City), born Eleanora Derenkowsky, was an American avant-garde filmmaker and film theorist of the 1940s and 1950s. Deren was also a choreographer, dancer, poet, writer and photographer.