Question: What occupation is shared by American screenwriter Delmer Daves, and Italian producer Dario Argento?

Context articles: Drum Beat
Frank Hotaling
The Hanging Tree
Dario Argento
The Mother of Tears
Delmer Daves
Dario Argento's World of Horror
Destination Tokyo
Claudio Argento
The Badlanders

Drum Beat is a 1954 CinemaScope western film in "WarnerColor" written and directed by Delmer Daves and co-produced by Daves and Alan Ladd in his first film for his Jaguar Productions company.
 Ladd stars along with Audrey Dalton, Charles Bronson as Captain Jack, and Hayden Rorke as President Ulysses S. Grant.
Frank Hotaling (April 4, 1909 – April 13, 1977) was an American art director, born in New York City, whose career encompassed over 100 films, mostly B movies.
 His association with famed director John Ford led to an Oscar nomination, shared with John McCarthy, Jr. and Charles S. Thompson, for Best Art Direction-Set Direction, Color, for 1952's "The Quiet Man".
 This brought an upsurge in his film work and allowed Hotaling the opportunity to work on such A-list projects as Ford's "The Searchers" (1956), Delmer Daves' "" (1957), and William Wyler's "The Big Country" (1958).
The Hanging Tree is a 1959 Technicolor Western film directed by Delmer Daves.
 Karl Malden took over directing duties for several days when Daves fell ill.
 The film stars Gary Cooper, Maria Schell, George C. Scott and Malden and is set in the gold fields of Montana during the gold rush of the 1860s and '70s.
 The story follows a doctor who saves a criminal from a lynch mob, then learns of the man's past and tries to manipulate him.
Dario Argento (] ; born 7 September 1940) is an Italian film director, producer, film critic and screenwriter.
 He is best known for his work in the horror film genre during the 1970s and 1980s, particularly in the subgenre known as "giallo", and for his influence on modern horror movies.
The Mother of Tears (Italian: "La Terza madre" , literally "The Third Mother") is a 2007 supernatural horror film written and directed by Dario Argento.
 The film stars Asia Argento, Daria Nicolodi, Moran Atias, Udo Kier, and Coralina Cataldi-Tassoni.
 The film has also been billed in English-speaking media as "Mater Lachrymarum", "The Third Mother" (English translation of the film's original Italian title), and "Mother of Tears: The Third Mother".
 Written by Argento, Jace Anderson, Walter Fasano, Adam Gierasch and Simona Simonetti, the film is the concluding installment of Argento's supernatural horror trilogy "The Three Mothers", which began with "Suspiria" in 1977.
 The film depicts the confrontation with the final "Mother" witch, known as Mater Lachrymarum.
Delmer Lawrence Daves (July 24, 1904 – August 17, 1977) was an American screenwriter, director and producer.
Il Mondo dell'orrore di Dario Argento ("Dario Argento's World of Horror") is an 1985 Italian documentary film, which chronicles the career of the Italian horror and suspense movie director, Dario Argento.
 It was the directorial debut of Michele Soavi, who later went on to direct the cult classic "Dellamorte Dellamore" in 1994.
Destination Tokyo is a 1943 black-and-white submarine war film.
 It was directed by Delmer Daves in his directorial debut, and the screenplay was written by Daves and Albert Maltz, based on an original story by former submariner Steve Fisher.
 The film stars Cary Grant and John Garfield and features Dane Clark, Robert Hutton, and Warner Anderson, along with John Ridgely, Alan Hale Sr., and William Prince.
 Production began on June 21, 1943 and continued through September 4 of that year.
 The film premiered in Pittsburgh, Pennsylvania on December 15, 1943 as a benefit for crippled children, and was released generally in the U.S. on December 31, 1943.
Claudio Argento (born 15 September 1943) is an Italian film producer and screenwriter.
 Most of the titles he has produced have been the horror films directed by his older brother, Dario Argento.
 One major exception was Alejandro Jodorowsky's cult film "Santa Sangre" (1989); in addition to producing, Claudio Argento co-wrote the screenplay for the film.
 Argento was an associate producer for George A. Romero's "Dawn of the Dead" (1978).
The Badlanders (1958) is a western caper film directed by Delmer Daves and starring Alan Ladd and Ernest Borgnine.
 Based on the 1949 novel "The Asphalt Jungle" by W. R. Burnett, the story was given an 1898 setting by screenwriter Richard Collins.
 It is the second film adaptation of the novel following 1950's "The Asphalt Jungle."