Question: Were both Ralph Smart and John Sayles American?

Context articles: Bush Christmas (1947 film)
Maggie Renzi
The Good Old Days (film)
Danger Man
John Sayles
Ralph Smart
Go for Sisters
Henry Murdoch
Curtain Up
A Boy, a Girl and a Bike

Bush Christmas is a 1947 Australian–British comedy film directed by Ralph Smart and starring Chips Rafferty.
 It was one of the first movies from Children's Entertainment Films, later the Children's Film Foundation.
Maggie Renzi (born 1951) is an American film producer and actress.
 Renzi started acting as a child in the Williamstown Theatre Festival in Williamstown, Massachusetts and continued into her 20s there and in college productions.
 She graduated from Williams College in 1973 where she met John Sayles.
 She has been John Sayles' long time companion (and collaborator) though they haven't married.
 They released their first film "Return of the Secaucus 7" in 1979 with Renzi starring as Katie Sipriano and working as unit manager, assistant editor and actually functioning as producer.
 The film won the Best Screenplay award from the
The Good Old Days is a 1939 British comedy film directed by Roy William Neill.
 Written by Austin Melford and John Dighton based on a story by Ralph Smart, it stars Max Miller, Hal Walters and Kathleen Gibson.
 The film tells the story of group of entertainers struggling to obtain permission to perform at a tavern in 1840.
Danger Man (titled Secret Agent in the United States, and Destination Danger and John Drake in other non-UK markets) is a British television series which was broadcast between 1960 and 1962, and again between 1964 and 1968.
 The series featured Patrick McGoohan as secret agent John Drake.
 Ralph Smart created the programme and wrote many of the scripts.
 "Danger Man" was financed by Lew Grade's ITC Entertainment.
John Thomas Sayles (born September 28, 1950) is an American independent film director, screenwriter, editor, actor and novelist.
 He has twice been nominated for the Academy Award for Best Original Screenplay for "Passion Fish" (1992) and "Lone Star" (1996).
 His film "Men with Guns" (1997) was nominated for the Golden Globe for Best Foreign Language Film.
 His directorial debut, "Return of the Secaucus 7" (1980), has been added to the National Film Registry.
Ralph Foster Smart {'1': ", '2': ", '3': ", '4': "} (27 August 1908 – 12 February 2001) was a film and television producer, director, and writer, born in England to Australian parents.
Go for Sisters is a 2013 crime drama, written and directed by John Sayles.
 The title refers to the history of friendship between the two main characters: when they were in high school, the two African American women were so close they could "go for sisters".
 Sayles shot the film in 19 days, using 65 locations, for under a million dollars.
 The DVD was released in August 2014 and features a Directory Commentary in which Sayles goes on at length about the art and craft of guerrilla film making.
Henry Murdoch (17 September, 1920 - 24 April, 1987), born as George Henry Murdock, was an Australian aboriginal actor and stockman who appeared in Australian films of the 1940s and 1950s.
 He was working as stockman in Rockhampton when discovered by Ralph Smart, who was helping make "The Overlanders" (1946).
 The film's director, Harry Watt, later claimed Murdoch and fellow aboriginal actor Clyde Combo "proved to be first-class actors and were exceedingly quick witted and intelligent.
 They certainly disproved the conventional idea that the Australian aboriginal is an animalistic caveman."
Curtain Up is a 1952 British film directed by Ralph Smart, written by Jack Davies and Michael Pertwee.
 It is based on the play "On Monday Next" by Philip King.
A Boy, a Girl and a Bike is a 1949 British romantic comedy film directed by Ralph Smart and starring John McCallum, Honor Blackman and Patrick Holt.
 The film's art direction was by George Provis.
 The film concerns the romantic escapades and adventures of a Yorkshire cycling club.