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Dziga Vertov ( born David Abelevich Kaufman,, and also known as Denis Kaufman; 2 January 1896 [O.S. 21 December 1895] – 12 February 1954) was a Soviet pioneer documentary film and newsreel director, as well as a cinema theorist. His filming practices and theories influenced the cinéma vérité style of documentary movie-making and the Dziga Vertov Group, a radical film-making cooperative which was active from 1968 to 1972. Wikipedia