While Kurt Kren is a film maker, John Grierson is a what?
Kurt Kren: Kurt Kren (September 20, 1929 - died in Vienna on June 23, 1998) was an Austrian avant-garde filmmaker. John Grierson: John Grierson CBE (26 April 1898 – 19 February 1972) was a pioneering Scottish documentary maker, often considered the father of British and Canadian documentary film.
documentary maker