Question: Elizabeth Violet Polunin is most notably know for her work with a Russian ballet impresario born in which year ?
Sentence (from "Sergei Diaghilev"): Sergei Pavlovich Diaghilev ( ; Russian: Серге́й Па́влович Дя́гилев , "Sergei Pavlovich Dyagilev"; ] ; 31 March [O.S. 19 March] 1872 19 August 1929), usually referred to outside Russia as Serge, was a Russian art critic, patron, ballet impresario and founder of the Ballets Russes, from which many famous dancers and choreographers would arise.
Relevant evidence: Yes