Question: What year was the film produced that Diana Körner is probably most known for?

Context articles: Diana Ross Sings Songs From The Wiz
Diana Körner
Diana Mini Camera
Das fliegende Klassenzimmer
Make It Three
Willie Dynamite
Island in the Sun (film)
Barry Lyndon
The Unholy Wife
Miss 139

Diana Ross Sings Songs From The Wiz is an album by Diana Ross, released by Motown Records/Universal on November 27, 2015.
 The album features Ross' versions of songs from the film version of the musical "The Wiz", in which she starred along with Michael Jackson.
 The songs were originally recorded in 1978, produced by Ross, Suzanne de Passe and Grammy Award winner Lee Holdridge.
 Motown originally planned to release the album in 1979 (a year after the film's original soundtrack) but it was cancelled following low box office returns and highly negative critical response to the film.
Diana Körner (born 24 September 1944 in Wolmirsleben, Germany) is a German actress.
 She is probably best known outside Germany for her brief character in Stanley Kubrick's period film "Barry Lyndon".
The Diana Mini Camera is a plastic box camera that utilizes 35mm film, and is a part of a long line of lomographic cameras known for taking photos vibrant in color with deep saturation and vignettes shot through a plastic lens.
 It is capable of taking 72 exposures per roll of film in "half-frame" mode and 36 exposures in "square" mode.
 It can also take multiple exposures.
 Modeled after the original Diana camera, the Diana Mini is one of many reproductions and re-imaginings of the Diana camera by the Austria-based company, Lomographische AG FN: FN 134784.
 The Diana Mini is one of several new production versions of the Diana camera currently available as the "Diana+" series, produced by Lomography.
Das fliegende Klassenzimmer (English:The Flying Classroom) is a 1973 German comedy film directed by Werner Jacobs and starring Joachim Fuchsberger, Heinz Reincke and Diana Körner.
 Two classes in a school have a running feud.
 It is based on "The Flying Classroom", a novel by Erich Kästner.
Make It Three is a 1938 British comedy film directed by David MacDonald and starring Hugh Wakefield, Edmund Willard and Diana Beaumont.
 The screenplay concerns a bank clerk who is left a very large inheritance on condition that he first serve three months in prison.
 It was the last film produced by Julius Hagen who had owned Twickenham Studios.
 The film was a quota quickie, made for release by MGM.
Willie Dynamite is a 1974 American blaxploitation film, starring Roscoe Orman, Diana Sands, Thalmus Rasulala, Joyce Walker, and was released by Universal Pictures.
 The eponymous Willie Dynamite is a pimp in New York City, who strives to be number one in the city.
 As he is trying to do so, a social worker named Cora, is trying to change his ways - as well as those of the women who work for him - for the better.
 It was the first film produced by the Zanuck-Brown Company.
Island in the Sun is a 1957 De Luxe in CinemaScope drama film produced by Darryl F. Zanuck and directed by Robert Rossen.
 It features an ensemble cast including James Mason, Harry Belafonte, Joan Fontaine, Joan Collins, Dorothy Dandridge, Michael Rennie, Stephen Boyd, Patricia Owens, John Justin, Diana Wynyard, and Basil Sydney.
 The film is about race relations and interracial romance set in the fictitious island of Santa Marta.
 Barbados and Grenada were selected as the sites for the movie based on the 1955 novel by Alec Waugh.
 The film was controversial at the time of its release for its portrayal of an interracial romance.
Barry Lyndon is a 1975 British-American period drama film written, produced, and directed by Stanley Kubrick, based on the 1844 novel "The Luck of Barry Lyndon" by William Makepeace Thackeray.
 It stars Ryan O'Neal, Marisa Berenson, Patrick Magee, and Hardy Krüger.
 The film recounts the exploits of a fictional 18th-century Irish adventurer.
 Exteriors were shot on location in Ireland, England and Germany.
The Unholy Wife is a 1957 Technicolor film noir crime film produced and directed by John Farrow at RKO Radio Pictures, but released by Universal Pictures as RKO was in the process of ceasing its film activities.
 The film features Diana Dors, Rod Steiger, Tom Tryon and Beulah Bondi.
 The screenplay was written by William Durkee and Jonathan Latimer
Miss 139 is a 1921 American silent crime drama film produced by A. H. Fischer and distributed by Jans Film Service and Sherman Productions Corporation.
 B. A. Rolfe was the director and Charles Logue wrote the story and the screenplay.
 Its Swedish-born star Diana Allen had been a Ziegfeld girl.