question: What nationality is the director of film His Last Dollar?
context: [["His Last Dollar", ["His Last Dollar is a lost 1914 American comedy silent film directed by Frank Powell and written by David Higgins.", "The film stars David Higgins, Betty Gray, Hal Clarendon, Edgar L. Davenport, Wellington A. Playter and Jack Pickford.", "The film was released on October 29, 1914, by Paramount Pictures."]], ["John Donatich", ["John Donatich is the Director of Yale University Press."]], ["Michael Govan", ["Michael Govan( born 1963) is the director of the Los Angeles County Museum of Art since 2006.", "Prior to this, Govan worked as the director of the Dia Art Foundation in New York City."]], ["Ian Barry (director)", ["Ian Barry is an Australian director of film and TV."]], ["Robert Stevens (director)", ["Robert Stevens( December 2, 1920 \u2013 August 7, 1989) was an American director and producer.", "He led on a career of producing and directing many television shows and movies for nearly 4 decades.", "He was most active throughout the 1950s and 1960s.", "His most famous and notable works include his works as the producer/ director of\" Suspense\", as the director of\" Alfred Hitchcock Presents\" and as the director of\" The Alfred Hitchcock Hour\" and as the director of the movie\" Change of Mind\".", "He also directed the pilot of\" The Twilight Zone\".", "Work became slow for Stevens after the 1970s.", "His last work was as the director of an episode of\" Amazing Stories\" in 1987.", "In 1989, shortly before his death, Stevens was robbed and beaten in his rented Westport, Connecticut home where he had retired to in 1987.", "He died shortly thereafter of cardiac arrest on August 7, 1989 in Westport.", "He was 68 years old."]], ["Dana Blankstein", ["Dana Blankstein- Cohen( born March 3, 1981) is the director of the Israeli Academy of Film and Television.", "She is a film director, and an Israeli culture entrepreneur."]], ["John Farrell (businessman)", ["John Farrell is the director of YouTube in Latin America."]], ["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."]], ["Frank Powell", ["Frank Powell (born Francis William Powell, May 8, 1877) was a Canadian-born stage and silent film actor, director, producer, and screenwriter who worked predominantly in the United States.", "He is also credited with \"discovering\" Theda Bara and casting her in a starring role in the 1915 release \"A Fool", "There Was\".", "Her performance in that production, under Powell's direction, quickly earned Bara widespread fame as the film industy's most popular evil seductress or on-screen \"vamp\"."]], ["Peter Levin", ["Peter Levin is an American director of film, television and theatre."]]]
supporting_facts: [["His Last Dollar", 0], ["Frank Powell", 0]]
evidences: [["His Last Dollar", "director", "Frank Powell"], ["Frank Powell", "country of citizenship", "Canadian"]]
answer: Canadian