Question: Who is also known as the writer of the Frank Buck film serial "Jungle Menace", Edgar Selwyn or Dallas M. Fitzgerald ?

Context paragraphs:
Robert Mintz: Robert Mintz (4 April 1897 – 9 May 1971) was a producer of the Frank Buck film serial "Jungle Menace".

Harry L. Fraser: Harry L. Fraser (31 March 1889 – 8 April 1974) was an American film director.  He directed over 80 films between 1925 and 1951, including the 1934 John Wayne film "Randy Rides Alone" and the Frank Buck 1937 cliffhanger serial "Jungle Menace".  He had a small acting role in the John Wayne film "'Neath the Arizona Skies".  He also wrote screenplays, including "Chick Carter, Detective" (1946).

George M. Merrick: George Martin Merrick (born February 2, 1883 in Buffalo, New York, USA; died December 16, 1964 (age 81) in Los Angeles, California, USA) was a writer of the Frank Buck serial Jungle Menace.

Herman Schopp: Herman Schopp (born 28 June 1899 Radzichower, Austria (now Radziejów, Poland); died August 8, 1954, Santa Marinella, Italy, age 55) was a cinematographer of the Frank Buck serial Jungle Menace.

Sherman L. Lowe: Sherman L. Lowe (born Salt Lake City, Utah (or Russia), 18 October 1894; died 24 Jan 1968, age 73, Los Angeles) was a writer of the Frank Buck serial Jungle Menace.

Earl Turner (film editor): Earl Carver Turner (27 March 1884 – 6 November 1971) was a film editor of the Frank Buck serial "Jungle Menace".

Charlotte Henry: Charlotte Henry (March 3, 1914 – April 11, 1980) was an American actress who is best remembered for her roles in "Alice in Wonderland" (1933) and "Babes in Toyland" (1934).  She also starred in the Frank Buck serial "Jungle Menace" (1937).

Dallas M. Fitzgerald: Dallas M. Fitzgerald (born August 13, 1876 in La Grange, Kentucky, US; died: May 9, 1940 (age 63) in Los Angeles) was an American motion picture director and producer, primarily in the silent era.  He is also known as the writer of the Frank Buck film serial "Jungle Menace".

Edgar Selwyn: Edgar Selwyn (October 20, 1875 – February 13, 1944) was a prominent figure in American theater and film in the first half of the 20th century.  He co-founded Goldwyn Pictures in 1916.

George Rosener: George Michael Rosener (May 26, 1884-March 29, 1945) was an American film actor.  He also wrote and acted in the Frank Buck serial "Jungle Menace".

Supporting paragraphs: Dallas M. Fitzgerald Edgar Selwyn
Answer: Dallas M. Fitzgerald