Question: Who is a sibling of the producer of The Love Light?

full_context: Document 1: Love by the Light of the Moon: Love by the Light of the Moon is a 1901 film by Edwin S. Porter, produced by the Edison Manufacturing Company. It mixes animation and live action and predates the man in the moon theme of the 1902 French science fiction film "A Trip to the Moon" by Georges Méliès.
Document 2: A Sister's Love: A Sister's Love is a 1912 American short silent drama film directed by D. W. Griffith and starring Blanche Sweet.
Document 3: Mr. Flip: Mr. Flip is a 1909 American silent comedy film made by Essanay Studios, directed by Gilbert M. 'Broncho Billy' Anderson and starring Ben Turpin. The film is about a man going to various locations in town where he flirts with the women, and they in turn get revenge on him, causing him to leave their establishment. This film is believed to have included the first cinematic instance of a comedian being hit in the face with a pie, later known as the Pie in the Face, when Ben Turpin was struck. However, the pie Turpin was hit with was hand-held, not thrown.
Document 4: The Love Flower: The Love Flower is a 1920 American silent drama film produced by D. W. Griffith and released through the then nascent United Artist company of which Griffith was a founding partner.
Document 5: Johanna Enlists: Johanna Enlists is a 1918 silent film comedy-drama produced by and starring Mary Pickford with distributed by Paramount Pictures. The film was directed by William Desmond Taylor from a short story by Rupert Hughes, "The Mobilization of Johanna". Frances Marion, a frequent Pickford collaborator, wrote the scenario. The film was made at a time during World War I when sentimental or patriotic films were immensely popular. It was an early starring vehicle for Monte Blue, the male lead opposite Pickford. The film survives in several prints, including one at the Library of Congress.
Document 6: Fascinating Youth: Fascinating Youth is a 1926 American silent romantic comedy film directed by Sam Wood. It starred Charles "Buddy" Rogers (in his feature debut), along with Thelma Todd and Josephine Dunn in supporting roles. Many well-known personalities made guest appearances in the film, judging a beauty contest in one scene, and Clara Bow makes a cameo appearance in her second film for Paramount Pictures.
Document 7: The Great Love (1918 film): The Great Love is a 1918 American silent war drama film directed and written by D. W. Griffith who, along with scenario writer Stanner E.V. Taylor, is credited as "Captain Victor Marier". The film stars George Fawcett and Lillian Gish. Set during World War I, exterior scenes were shot on location in England. "The Great Love" is now considered to be a lost film.
Document 8: Laurel and Hardy: Prior to emerging as a team, both actors had well - established film careers. Laurel had appeared in over 50 films as an actor (while also working as a writer and director) while Hardy had been in more than 250 productions. The two comedians had previously worked together as cast members on the film The Lucky Dog in 1921. However, they were not a comedy team at that time and it was not until 1926 that they appeared in a movie short together, when both separately signed contracts with the Hal Roach film studio. Laurel and Hardy officially became a team in 1927 when they appeared together in the silent short film Putting Pants on Philip. They remained with the Roach studio until 1940 and then appeared in eight ``B ''movie comedies for 20th Century Fox and Metro - Goldwyn - Mayer from 1941 to 1945. After finishing their movie commitments at the end of 1944, they concentrated on performing in stage shows and embarked on a music hall tour of England, Ireland, and Scotland. In 1950, before retiring from the screen, they made their last film, a French - Italian co-production called Atoll K.
Document 9: Ruth Donnelly: Though she made her first film appearance in 1913, her Hollywood career began in earnest in 1931 and lasted until 1957. In her films she often played the wife of Guy Kibbee ("Footlight Parade", "Wonder Bar", "Mr. Smith Goes to Washington"). Among her roles was the part of Sister Michael in "The Bells of St. Mary's", starring Bing Crosby and Ingrid Bergman. Years after her final film role, she returned to the stage, understudying Patsy Kelly in the Broadway revival of "No No Nanette" with old co-star Ruby Keeler and later appearing in the touring production starring Don Ameche and Evelyn Keyes.
Document 10: Bianca Minola: Linda Arvidson plays Bianca in the first screen version of the play directed by D.W. Griffith (1908). Dorothy Jordan plays Bianca in the first ``talkie ''film version of the play with Mary Pickford as Kate and Douglas Fairbanks as Petruchio. Natasha Pyne renders the role in the 1967 film starring Elizabeth Taylor as Kate and her then - husband Richard Burton as Petruchio. Susan Penhaligon appears as Bianca in the 1980 BBC television production directed by Jonathan Miller. Laura Boccanera plays Bianca in the most recent film version of the play, Kate - La bisbetica domata (2004) which was billed as the first - ever stop - animation movie made in Italy.
Document 11: Exit Smiling: Exit Smiling is a 1926 comedy film directed by Sam Taylor and starring New York and London revues star Beatrice Lillie in her first (and only silent) film role and Jack Pickford, the brother of star Mary Pickford. The film was also the debut of actor Franklin Pangborn. This film is available on DVD from the Warner Archives Collection.
Document 12: Jack Standing: The son of stage actor Herbert Standing and brother of Wyndham Standing (1880–1963), who also was a famous actor in the early days of film, Jack Standing first appeared in Broadway musicals such as "The Belle of New York" and "Florodora" before he went to the Biograph Company in 1909. Because he was a handsome young man, he was quickly offered many roles and signed a contract with Sigmund Lubin in 1911. Like many others from the silent film, Standing was asked to play quite everything from passionate lovers to villains or old men. In 1915, he told the "Moving Picture World" magazine, "Spare me from being a one-type actor!" He appeared in more than fifty films. An incomplete print of 1915 Mary Pickford vehicle "Fanchon the Cricket", in which Standing co-starred, has recently been found. The teenage Fred and Adele Astaire allegedly made their screen debuts in this film. Standing's greatest success was the 1916 film "Hell's Hinges", where he played the weak-willed brother of Clara Williams.
Document 13: The Love Light: The Love Light is a 1921 American silent drama film starring Mary Pickford. The film was written and directed by Frances Marion.
Document 14: Love in the Hills: Love in the Hills is a 1911 American short silent drama film directed by D. W. Griffith and starring Blanche Sweet.
Document 15: Fine Manners: Fine Manners is a 1926 American black-and-white silent comedy film directed initially by Lewis Milestone and completed by Richard Rosson for Famous Players-Lasky/Paramount Pictures. After an argument with actress Gloria Swanson, director Milestone walked off the project, causing the film to be completed by Rosson, who had picked up directorial tricks while working as an assistant director to Allan Dwan. The success of the film, being Rosson's first directorial effort since he co-directed "Her Father's Keeper" in 1917 with his brother Arthur Rosson, won him a long-term contract with Famous Players-Lasky.
ground_truth: Jack Pickford
sub_queries: The Love Light >> producer Answer: Mary Pickford
Mary Pickford >> sibling Answer: Jack Pickford