Question: The Ladder of Lies stars what american film actress best known as the estranged wife of silent film star Rudolph Valentino

full_context: Document 1: The Collected Essays and Occasional Writings of Katherine Anne Porter: The Collected Essays and Occasional Writings of Katherine Anne Porter
Document 2: Sinners (1920 film): Sinners is a lost 1920 American silent drama film based on a play of the same name by Owen Davis. The play was produced by William A. Brady and starred his daughter Alice Brady who also stars in this film. The Realart Company produced and released the film. Alice Brady's husband James Crane appears in this picture as well as in her next film, "A Dark Lantern".
Document 3: The Tower of Lies: The Tower of Lies (1925) was an American silent drama film directed by Victor Sjöström based upon Selma Lagerlöf's novel "The Emperor of Portugallia" (1914). Released one year after "He Who Gets Slapped", the film marks the second collaboration between Sjöström, Lon Chaney and Norma Shearer. Also starring are William Haines, Ian Keith and Lew Cody.
Document 4: Rudolph Valentino filmography: Rudolph Valentino (1895–1926) was an Italian-born actor in the era of silent films. He emigrated to the United States in 1913 and took a string of temporary menial jobs before becoming a film extra in 1914. He appeared in several films until 1921—many of which are now lost. That year he got his major break when he appeared in the role of Julio in "The Four Horsemen of the Apocalypse". According to Valentino's biographer, Noel Botham, the film was "hailed ... [as] a masterpiece and Valentino as a star"; the film grossed $4.5 million at the North American box office.
Document 5: Sharon Acker: Sharon Acker (born April 2, 1935) is a Canadian film, stage, and television actress and model. Acker appeared mostly on television in Canada and the United States from 1956–1992. She played Della Street, Perry Mason’s loyal secretary in "The New Perry Mason". Her film roles include "Lucky Jim", "Point Blank" and "Don't Let the Angels Fall".
Document 6: Trailed by Three: Trailed by Three is a 1920 American western film serial directed by Perry N. Vekroff. This is now considered to be a lost film.
Document 7: Florence Hackett: Florence Hackett (née Florence Hart) (January 1882 – August 21, 1954) was an American film actress in the silent era. She was allegedly married to veteran film star Arthur V. Johnson, reputedly D.W. Griffith's favorite actor. Previously she was married to a man named Maurice Hackett and had two sons, Albert Hackett and Raymond Hackett and a daughter Jeannine Hackett. Hackett was the proverbial stage mother involving her sons first in the theater then in motion pictures. From 1912 she and Johnson played in numerous films together with him directing many of them right up to his 1916 death. They were the type of films classified today as 'shorts', that is they ran one or two reels. Her boys also appeared in some of the films making the work more of a family affair. She made her last film appearance in 1920.
Document 8: A Fallen Idol: A Fallen Idol is a lost 1919 American silent melodrama film starring Evelyn Nesbit, a disgraced Broadway showgirl involved in the murder of architect Stanford White in 1906. As the title might imply to the film going public, the movie is yet another feature harking back to Nesbit's involvement in public scandal.
Document 9: When Love Grows Cold: When Love Grows Cold is a lost 1926 silent film drama directed by Harry O. Hoyt, and starring Clive Brook and Natacha Rambova in her only screen starring performance. Rambova was chiefly famous for being the wife of Rudolph Valentino. The film was originally titled "Do Clothes Make the Woman?" But in view of Valentino's recent divorce from Rambova, the distributor took the opportunity to bill her as 'Mrs Valentino' and changed the title to "When Love Grows Cold". She was mortally offended and never worked in film again.
Document 10: Jean Harlow filmography: Jean Harlow (1911–1937) was an American actress, known for her sense of humor, who starred in a series of financially successful motion pictures throughout the 1930s.
Document 11: Jean Acker: Jean Acker (October 23, 1893 – August 16, 1978) was an American film actress with a career dating from the silent film era through the 1950s. She was perhaps best known as the estranged wife of silent film star Rudolph Valentino.
Document 12: The Ladder of Lies: The Ladder of Lies is a lost 1920 American drama silent film directed by Tom Forman and written by Edith M. Kennedy and Harold Vickers. The film stars Ethel Clayton, Clyde Fillmore, Jean Acker, Irving Cummings, Charles Meredith and Ruth Ashby. The film was released on July 11, 1920, by Paramount Pictures.
Document 13: Tom Forman (actor): Tom Forman (February 22, 1893 – November 7, 1926) was an American motion picture actor, director, writer, and producer of the early 1920s.
Document 14: Vilma Bánky: Vilma Bánky (9 January 1901 – 18 March 1991) was a Hungarian-born American silent film actress, although the early part of her acting career began in Budapest, spreading to France, Austria, and Germany. Bánky was best known for her roles in "The Eagle" and "The Son of the Sheik" with Rudolph Valentino and several romantic teamings with Ronald Colman.
Document 15: The Lie (2011 film): The Lie is a 2011 American drama/comedy film written and directed by Joshua Leonard with additional writing by Jeff Feuerzeig, Mark Webber, and Jess Weixler, based on the short story "The Lie" by T. Coraghessan Boyle, printed in "The New Yorker". The film stars Joshua Leonard as Lonnie, Jess Weixler as Clover, and Mark Webber as Tank. The film is about how a man's life is altered unexpectedly after telling a lie to get out of work. The original short story was sixteen pages long. The crew spent two and a half weeks shooting the film, and six months editing it. The film had its world premiere at the 2011 Sundance Film Festival.
ground_truth: Jean Acker