Question: What German film director directed a 1920 silent film considered to be lost? 

Context articles: Uneasy Money (film)
Evening – Night – Morning
F. W. Murnau
Caravan of Death (film)
The Devil Worshippers
Tommy Atkins (director)
The Frisky Mrs. Johnson
Lovers (1927 film)
Tempelhof Studios
Soft Cushions

Die Abenteuer eines Zehnmarkscheines (K. 13513 ), also known as Adventures of a Ten Mark Note and Uneasy Money, is a German silent film directed by Berthold Viertel.
 It was released in 1926.
 This film considered lost.
Evening – Night – Morning (German: Abend – Nacht – Morgen ) is a 1920 silent German drama film directed by F. W. Murnau.
 The film is considered to be lost.
Friedrich Wilhelm "F. W." Murnau (born Friedrich Wilhelm Plumpe; December 28, 1888March 11, 1931) was a German film director.
 Murnau was greatly influenced by Schopenhauer, Nietzsche, Shakespeare and Ibsen plays he had seen at the age of 12, and became a friend of director Max Reinhardt.
 During World War I he served as a company commander at the eastern front and was in the German air force, surviving several crashes without any severe injuries.
Caravan of Death (German: Die Todeskarawane ) is a 1920 silent German film directed by Josef Stein and featuring Carl de Vogt as Kara Ben Nemsi.
 Béla Lugosi played a supporting role.
 The film was an adaptation of the Karl May novel of the same name and is now considered to be lost.
The Devil Worshippers (German: Die Teufelsanbeter ) is a six-chapter 1920 silent German film directed by the Turkish director Muhsin Ertuğrul, written by Marie Luise Droop, and featuring Carl de Vogt in the title-role of Kara Ben Nemsi.
 Later horror-star Béla Lugosi is being seen in one of his first supporting roles in a film.
 The film was an adaptation of a chapter from the novel "Durch die Wüste" ("Through the Desert") of German author Karl May.
Tommy Atkins was an American director of the silent and early sound film eras.
 Born on July 18, 1887 in Springfield, Massachusetts, he would make his entrance into the film industry as the assistant director to Ralph Ince on the 1920 silent film, "Out of the Snows".
 It would be another eight years before he would make another film, again as assistant director, this time for FBO Pictures, on another silent film, "Crooks Can't Win".
 He'd work as the assistant director on another sixteen films between 1928 and 1934, the most notable of which would be 1933's "Morning Glory", directed by Lowell Sherman and starring Katharine Hepburn and Douglas Fairbanks Jr..
 In 1934 he would be given the chance to helm his first picture, "The Silver Streak", which was one of the top money-makers for RKO Pictures that year.
 He would only direct two more films, the second of which, "Hi, Gaucho!
", he would also write the story for.
The Frisky Mrs. Johnson is a 1920 silent film comedy starring Billie Burke.
 It was produced by Famous Players-Lasky and distributed through Paramount Pictures.
 It is based on a 1903 Broadway stage play by Clyde Fitch.
 On the stage Burke's part was played by Amelia Bingham.
 Burke's next to last silent film.
 It is a lost film.
Lovers or Lovers?
 is a 1927 silent film romance drama produced and distributed by MGM and directed by John M. Stahl.
 It stars Ramon Novarro and Alice Terry.
 The is based on the play "The World and His Wife" and is a remake of a 1920 silent of the same name from Paramount.
 "Lovers" is a lost film.
The Tempelhof Studios are a film studio located in Tempelhof in the German capital of Berlin.
 They were founded in 1912, during the silent era, by German film pioneer Alfred Duskes who built a glass-roofed studio on the site with financial backing from the French company Pathé.
 The producer Paul Davidson's PAGU then took control and constructed a grander structure.
 The First World War propaganda drama "The Yellow Passport", the historical comedy "Madame DuBarry" and the expressionist 1920 silent film "The Golem" were made there by PAGU.
Soft Cushions is a 1927 American comedy film directed by Edward F. Cline and featuring Boris Karloff.
 It is a comic take by actor and producer Douglas MacLean on the 1911 "Kismet" play and 1920 silent film.
 It's listed as being lost by Arne Andersen's Lost Film Files website.