Question: Which documentary film maker was considered the father of British and Canadian documentary film, Roman Karmen or John Grierson?
Sentence (from "Roman Karmen"): Roman Lazarevich Karmen (Russian: Рома́н Ла́заревич Карме́н ; 29 November [O.S. 16 November] 1906 in Odessa – 28 April 1978 in Moscow) was a Soviet war camera-man and film director and one of the most influential figures in documentary film making.
Relevant evidence: Yes