Question: Delbert Mann and Nunnally Johnson, share which occupation?

Context articles: Delbert Mann
The Dark at the Top of the Stairs (film)
Nunnally Johnson
1955 Cannes Film Festival
The World of Henry Orient
Quick, Before It Melts
The Angel Wore Red
Nora Johnson
Desire Under the Elms (film)
Home to Stay

Delbert Martin Mann Jr. (January 30, 1920 – November 11, 2007) was an American television and film director.
 He won the Academy Award for Best Director for the film "Marty" (1955), adapted from a 1953 teleplay of the same name which he had also directed.
 From 1967 to 1971, he was president of the Directors Guild of America.
 In 2002, he received the DGA's honorary life member award.
 Mann was credited to have "helped bring TV techniques to the film world."
The Dark at the Top of the Stairs is a 1960 American drama film.
 Academy Award winner Delbert Mann directed the work of Robert Preston and Dorothy McGuire in the production.
 Shirley Knight garnered an Oscar nomination for Best Supporting Actress, and Lee Kinsolving was nominated for a Golden Globe Award as Best Supporting Actor.
 Knight was also nominated for two Golden Globes.
 Mann's direction was nominated for a Directors Guild of America Award for Outstanding Directing in a Feature Film.
 It was based on the Tony Award nominated play of the same name by William Inge.
Nunnally Hunter Johnson (December 5, 1897 – March 25, 1977) was an American filmmaker who wrote, produced, and directed motion pictures.
The 8th Cannes Film Festival was held from 26 April to 10 May 1955.
 The Golden Palm went to the US film "Marty" by Delbert Mann.
 The festival opened with "Du rififi chez les hommes" by Jules Dassin and closed with "Carmen Jones" by Otto Preminger.
The World of Henry Orient is a 1964 American comedy film based on the novel of the same name by Nora Johnson, who co-wrote the screenplay with her father, Nunnally Johnson.
 It was directed by George Roy Hill and stars Peter Sellers, Paula Prentiss, Angela Lansbury, Tippy Walker, Merrie Spaeth, Phyllis Thaxter, Bibi Osterwald and Tom Bosley.
Quick, Before It Melts is a 1964 Panavision and Metrocolor comedy film directed by Delbert Mann, written by Dale Wasserman, starring Robert Morse, George Maharis, and Anjanette Comer and released by Metro-Goldwyn-Mayer.
 It was based on a novel of the same title by Philip Benjamin.
The Angel Wore Red, also known as La Sposa Bella in its Italian version, is a 1960 Italian-American romantic war drama starring Ava Gardner and Dirk Bogarde made by MGM and Titanus.
 It was directed by Nunnally Johnson and produced by Goffredo Lombardo, from a screenplay by Johnson based on the 1953 novel "The Fair Bride" by Bruce Marshall.
Nora Johnson, daughter of filmmaker Nunnally Johnson and Marion Byrnes, was born in Hollywood, California in 1933.
 She was educated at the Brearley School, Abbot Academy, and Smith College, from which she graduated in 1954.
 Her sister was the film editor Marjorie Fowler.
Desire Under the Elms is a 1958 American film version of the 1924 play "Desire Under the Elms" written by Eugene O'Neill.
 The film was directed by Delbert Mann from a screenplay by O'Neill and Irwin Shaw.
 The cast included Sophia Loren as Abbie (known as Anna in the film), Anthony Perkins as Eben, Burl Ives as Ephraim, Frank Overton as Simeon and Pernell Roberts as Peter.
 The film was nominated for Best Black and White Cinematography (Daniel L. Fapp) at the Academy Awards and Laurel Awards in 1959.
 It was also entered into the 1958 Cannes Film Festival.
Home to Stay is a 1978 Canadian CBS-TV drama TV film directed by Delbert Mann and starring Henry Fonda, Michael McGuire and Frances Hyland.