Question: Who is the spouse of the director of film In Memory Of Sergo Ordzhonikidze?
Sentence (from "Dziga Vertov"): Dziga Vertov (born David Abelevich Kaufman, , and also known as Denis Kaufman; 2 January 1896 – 12 February 1954) was a Russian Soviet pioneer documentary film and newsreel director, as well as a cinema theorist.
Relevant evidence: No