question: Where was the director of film The Unknown Cavalier born?
context: [["The Unknown Cavalier", ["The Unknown Cavalier is a 1926 American silent western film directed by Albert S. Rogell and starring Ken Maynard, Kathleen Collins and David Torrence."]], ["S. N. Mathur", ["S.N. Mathur was the Director of the Indian Intelligence Bureau between September 1975 and February 1980.", "He was also the Director General of Police in Punjab."]], ["Peter Levin", ["Peter Levin is an American director of film, television and theatre."]], ["Olav Aaraas", ["Olav Aaraas( born 10 July 1950) is a Norwegian historian and museum director.", "He was born in Fredrikstad.", "From 1982 to 1993 he was the director of Sogn Folk Museum, from 1993 to 2010 he was the director of Maihaugen and from 2001 he has been the director of the Norwegian Museum of Cultural History.", "In 2010 he was decorated with the Royal Norwegian Order of St. Olav."]], ["Brian Kennedy (gallery director)", ["Brian Patrick Kennedy( born 5 November 1961) is an Irish- born art museum director who has worked in Ireland and Australia, and now lives and works in the United States.", "He is currently the director of the Peabody Essex Museum.", "He was the director of the Toledo Museum of Art in Ohio from 2010 to 2019.", "He was the director of the Hood Museum of Art from 2005 to 2010, and the National Gallery of Australia( Canberra) from 1997- 2004."]], ["Ian Barry (director)", ["Ian Barry is an Australian director of film and TV."]], ["Jesse E. Hobson", ["Jesse Edward Hobson( May 2, 1911 \u2013 November 5, 1970) was the director of SRI International from 1947 to 1955.", "Prior to SRI, he was the director of the Armour Research Foundation."]], ["Albert S. Rogell", ["Albert S. Rogell (August 21, 1901 Oklahoma City, Oklahoma - April 7, 1988 Los Angeles, California) was an American film director.", "Rogell directed more than a hundred movies between 1921 and 1958.", "He was the brother of producer Sid Rogell."]], ["Ride Him, Cowboy", ["Ride Him, Cowboy is a 1932 pre-Code Western film directed by Fred Allen for Warner Brothers, starring a 25- year- old John Wayne.", "Based on the 1923 novel of the same name by Kenneth Taylor Perkins, the film is a remake of\" The Unknown Cavalier\", a 1926 Ken Maynard Western, with lots of stock footage from the original.", "The film was released as\" The Hawk\" in the U.K."]], ["Alain Cavalier", ["Alain Cavalier( born 14 September 1931) is a French film director."]]]
supporting_facts: [["The Unknown Cavalier", 0], ["Albert S. Rogell", 0]]
evidences: [["The Unknown Cavalier", "director", "Albert S. Rogell"], ["Albert S. Rogell", "place of birth", "Oklahoma City, Oklahoma"]]
answer: Oklahoma City, Oklahoma