Question: Are Monte Hellman and John G. Blystone both american writers?

Context paragraphs:
Target: Harry: Target: Harry (also known as How to Make It and the original title What's in it for Harry?)  is a 1969 thriller film directed by Roger Corman.  The film was originally meant as a television pilot for the American Broadcasting Company.  Rather than show it as a made for television film, the film was released theatrically as "How to Make It".  The film was shot in Monaco and Turkey in 1967 with Monte Hellman editing the film in 1968.  Roger Corman took his name off the film and credited himself as "Henry Neill".

Trapped Ashes: Trapped Ashes is a 2006 American horror anthology film with segments directed by Sean S. Cunningham, Joe Dante, Monte Hellman, Ken Russell, and John Gaeta.

Monte Hellman: Monte Hellman (born July 12, 1932) is an American film director, producer, writer, and editor.  Hellman began his career as an editor's apprentice at ABC TV, and made his directorial debut with the horror film "Beast from Haunted Cave" (1959), produced by Roger Corman.

Patricia Pearcy: Patricia Sue Pearcy (born September 10, 1946) is an American film, stage, and television actress.  She began her career in theatre, appearing on Broadway and in local theatre companies in Connecticut and Kentucky before making her film debut in Monte Hellman's "Cockfighter" (1974).

John G. Blystone: John G. Blystone (December 2, 1892 – August 6, 1938) was an American film director.  He directed 100 films between 1915 and 1938.  He was born in Rice Lake, Wisconsin and died in Los Angeles, California from a heart attack.  His grave is located at Valhalla Memorial Park Cemetery.

Iguana (film): Iguana is a 1988 international film directed by Monte Hellman and starring Everett McGill in the main role.  The movie is based on the titular novel by Spanish author Alberto Vázquez-Figueroa, itself based on the life of a real Irish sailor called Patrick Watkins.  The movie was mainly shot on location in Lanzarote.  Monte Hellman won Bastone Bianco Award (Special Mention) for this movie on the Venice Film Festival in 1988.  "Iguana" premiered in theaters on April 1, 1988, and was released on DVD on January 30, 2001 via Anchor Bay Entertainment.  The movie ends with the titles "For Warren" as Hellman dedicated the film to his friend Warren Oates who died in 1982.

Flight to Fury: Flight to Fury is a 1964 film starring Jack Nicholson, Fay Spain and Dewey Martin.  The film was directed by Monte Hellman and filmed back to back with "Back Door to Hell" in the Philippines.  Nicholson was one of the writers of the screenplay.

The Shooting: The Shooting is a 1966 western film directed by Monte Hellman, with a screenplay by Carole Eastman (using the pseudonym "Adrien Joyce").  It stars Warren Oates, Millie Perkins, Will Hutchins, and Jack Nicholson, and was produced by Nicholson and Hellman.  The story is about two men who are hired by a mysterious woman to accompany her to a town located many miles across the desert.  During their journey, they are closely tracked by a black-clad gunslinger who seems intent on killing all of them.

Laurie Bird: Laurie Bird (September 26, 1953 – June 15, 1979) was an American film actress and photographer.  She appeared in only three films during the 1970s.  Two of them were directed by Monte Hellman.  She was romantically involved with Hellman and Art Garfunkel; committing suicide in the latter's apartment by taking an overdose of Valium.  Bird inspired one of Tim Kinsella's novels.

Road to Nowhere (film): Road to Nowhere is a 2010 American romance thriller independent film directed by Monte Hellman, written by Steven Gaydos, and starring Cliff De Young, Waylon Payne, Shannyn Sossamon, Tygh Runyan, and Dominique Swain.  It is Hellman's first feature film in 21 years.

Supporting paragraphs: Monte Hellman John G. Blystone
Answer: no