Question: Richard Donner and Percy Adlon, have which mutual occupations?

Context articles: Bagdad Cafe (TV series)
Younger and Younger
Mahler on the Couch
Percy Adlon
Salmonberries
Superman II: The Richard Donner Cut
Richard Donner
Bagdad Café
Céleste (film)
Rosalie Goes Shopping

Bagdad Cafe is an American television sitcom starring Whoopi Goldberg and Jean Stapleton that aired on CBS.
 The series premiered March 30, 1990, and ran two seasons before being cancelled in winter 1990.
 The last two episodes aired in July 1991.
 The show is based on the 1987 Percy Adlon film "Bagdad Cafe".
Younger And Younger is 1993 American comedy film directed by Percy Adlon.
Mahler on the Couch (German: Mahler auf der Couch ) is a 2010 German film directed by Percy Adlon and Felix Adlon.
 It is an historical drama depicting an affair between Alma Mahler and Walter Gropius, and the subsequent psychoanalysis of Mahler's husband Gustav Mahler by Sigmund Freud.
Paul Rudolf Parsifal "Percy" Adlon (] ; born 1 June 1935) is a German director, screenwriter, and producer.
 He is best known for his film "Bagdad Café".
 He is associated with the New German Cinema movement, whose "members" also include Werner Herzog and the illustrious Rainer Werner Fassbinder.
Salmonberries is a 1991 drama film directed by Percy Adlon and written by Adlon and his son Felix.
 It stars k.d. lang as Kotzebue, a young woman of androgynous appearance who works as a (male) miner in Alaska, and Rosel Zech as Roswitha, an East German immigrant and librarian.
 The film takes place in Kotzebue, Alaska and Berlin, Germany, shortly after reunification; the dialog is mostly English but includes some German with English subtitles.
Superman II: The Richard Donner Cut is a re-edited director's cut of the 1980 film "Superman II".
 It features a significant amount of lost footage shot by the original director, Richard Donner, in 1977 before he was taken off the project and replaced by Richard Lester, who completed the film for its theatrical release.
 In 2000, during the DVD restoration of "Superman: The Movie", editor Michael Thau became interested in completing Donner's version of "Superman II".
 In 2006, Donner's footage of Marlon Brando was discovered and used in Bryan Singer's "Superman Returns", finally creating the possibility of restoring Donner's cut.
Richard Donner (born Richard Donald Schwartzberg; April 24, 1930) is an American director and producer of film and television.
 After directing the horror film "The Omen" (1976), Donner became famous for directing the first modern superhero film, "Superman" (1978), starring Christopher Reeve.
Bagdad Café (also known as Out of Rosenheim) is a 1987 German film directed by Percy Adlon.
 It is a comedy-drama set in a remote truck-stop café and motel in the Mojave Desert in the US state of California.
 Loosely based on Carson McCullers' novella "The Ballad of the Sad Café" (1951), the film centers on two women who have recently separated from their husbands, and the blossoming friendship that ensues.
 It runs 95 minutes in the U.S. and 108 minutes in the German version.
Céleste is a 1982 German film by Percy Adlon about the life of the French writer Marcel Proust as he lay in his bed from 1912 to 1922; the story is told through the eyes of his real life maid, Céleste Albaret.
 She waited decades before writing her own book about the experience which was adapted for the screen by Percy Adlon.
Rosalie Goes Shopping is a 1989 English-language German film directed by Percy Adlon and starring Marianne Sägebrecht, Brad Davis, and Judge Reinhold.