Question: Which of the following is known for his work on the film "Red Gold": Lowell Sherman or Michael Keller?

Context paragraphs:
Bachelor Apartment: Bachelor Apartment is a 1931 American pre-Code RKO comedy/romance film directed by and starring Lowell Sherman as a womanizing playboy who falls in love with Irene Dunne's honest working girl.  The credits for the film, and all sources from that time show that the film was based on a story by New York playwright John Howard Lawson, the screenplay was adapted by J. Walter Ruben.  However, Lawson would later claim that the final screenplay had not been altered from what he had originally written.  The cast features Mae Murray (a former silent film star, who was attempting to make a come-back in talkies), Norman Kerry and Ivan Lebedeff.

Arthur Roberts (editor): Arthur Roberts July 17, 1890 – February 5, 1961), also known as Arthur E. Roberts, was an American film editor who edited over 100 films during his almost 30 year career.  He began ending towards the end of the silent era of the film industry, his first film being 1927's "The College Hero", directed by Walter Lang.  His last film was Republic's "Lay That Rifle Down" in 1955, after which he spent a brief period as the editor for the television series, "Lassie", before retiring in 1956.  During his career he would work with many famous directors, including Frank Capra (on several films, including "The Donovan Affair"), Lowell Sherman (on "The Royal Bed"), William Seiter (on several films, including "Way Back Home"), Edward Cline (on "Cracked Nuts"), George Cukor ("A Bill of Divorcement"), Dorothy Arzner (the first female member of the DGA, on "Christopher Strong"), Anthony Mann ("Strangers in the Night"), George Archainbaud ("Girls of the Big House"), Fritz Lang ("House by the River"),

Night Life of the Gods: Night Life of the Gods (also known as Thorne Smith's Night Life of the Gods) is a 1935 American fantasy film released by Universal Pictures.  Based on a 1931 novel by Thorne Smith, the film was directed by Lowell Sherman and starred Alan Mowbray as a scientist who devises a ray that can turn people to stone and bring statues to life.

Lawful Larceny: Lawful Larceny is a 1930 American melodramatic film, directed by Lowell Sherman from Jane Murfin's screenplay.  The screenplay, a melodrama, was based on the play of the same name by Samuel Shipman, which originally was a comedy.  It starred a staple of the early RKO stable, Bebe Daniels, along with Kenneth Thomson, Olive Tell and Lowell Sherman, who reprised the role he had created in the original Broadway play.  This film was a remake of the 1923 silent film version of the same name, produced by Famous Players-Lasky Corporation

Lowell Sherman: Lowell J. Sherman (October 11, 1885 – December 28, 1934) was an American actor and film director.  At a time when it was highly unusual, he was both the actor and director on several films in the early 1930s, before completely transitioning to the role of director.  At the height of his career, after scoring huge successes with his direction of the films "She Done Him Wrong" and "Morning Glory" (which starred Mae West and won her first Academy Award for Katharine Hepburn respectively), he succumbed to pneumonia after a brief illness.

The Gilded Lily (1921 film): The Gilded Lily is a surviving 1921 American silent drama film directed by Robert Z. Leonard and written by Clara Beranger and Tom McNamara.  The film stars Mae Murray, Lowell Sherman, Jason Robards, Sr., Charles K. Gerrard, and Leonora von Ottinger.  The film was released on March 6, 1921, by Paramount Pictures.

High Stakes (1931 film): High Stakes is a 1931 American Pre-Code comedy drama produced and released by RKO Pictures.  The picture was directed by Lowell Sherman who also stars and marks the last starring screen appearance of silent screen diva Mae Murray.  It is based on a 1924 Broadway play that starred Sherman playing the same role he plays in this film.

Tommy Atkins (director): 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.

Michael Keller (filmmaker): Michael Keller is an American independent filmmaker.  He was the writer, director, cinematographer, and editor for the film "Red Gold", a social crime drama about the illegal organ trade.

He Knew Women: He Knew Women is a 1930 American comedy film, directed by Hugh Herbert, from a screenplay by him and William B. Jutte, which was adapted from S. N. Behrman's 1927 play "The Second Man".  It starred Lowell Sherman and Alice Joyce, in her second to last film role.  The film just broke even.

Supporting paragraphs: Lowell Sherman Michael Keller (filmmaker)
Answer: Michael Keller