Question: Which film came out first, Murder By Proxy or Rx Murder?

Context paragraphs:
title: A Very English Murder
paragraph_text: A Very English Murder  is a 1974 Soviet teleplay directed by Samson Samsonov, based on the novel "An English Murder" by Cyril Hare.
title: Murder by Proxy
paragraph_text: Murder by Proxy, released in the United States as Blackout, is a 1954 British film noir crime drama film directed by Terence Fisher. It stars Dane Clark and Belinda Lee. The screenplay concerns a man who is offered money to marry a woman.
title: Murder by Rope
paragraph_text: Murder by Rope is a 1936 British mystery film directed by George Pearson and starring Constance Godridge, D.A. Clarke- Smith and Sunday Wilshin.
title: Rx Murder
paragraph_text: Rx Murder is a 1958 American crime film directed by Derek Twist and written by John W. Gossage and Derek Twist. It is based on the 1955 novel" The Deeds of Dr. Deadcert" by Joan Fleming. The film stars Rick Jason, Lisa Gastoni, Marius Goring, Sandy Scott, Mary Merrall and Vida Hope. The film was released on February 18, 1958, by 20th Century Fox.
title: The Night of Nights
paragraph_text: The Night of Nights is a 1939 black- and- white drama film written by Donald Ogden Stewart and directed by Lewis Milestone for Paramount Pictures that starred Pat O' Brien, Olympe Bradna, and Roland Young. The film received positive contemporary reviews from publications such as" The New York Times". Director Milestone went on to other successful productions after the film came out, including" Ocean's 11" and" Pork Chop Hill". The movie has no relation to the use of the phrase" Night of Nights" for the night of the Academy Awards ceremony, the album by musical group The Seekers, or the Touhou Project song.
title: Operation Leopard
paragraph_text: La légion saute sur Kolwezi also known as" Operation Leopard" is a French war film directed by Raoul Coutard filmed in French Guiana. The script is based on the true story of the Battle of Kolwezi that happened in 1978. It was diligently described in a book of the same name by former 1 REP Captain Pierre Sergent. He published his book in 1979; the film came out in 1980. Raoul Coutard shot the film in a documentary style.
title: Murder by Proxy: How America Went Postal
paragraph_text: Murder By Proxy: How America Went Postal is a 2010 American documentary film that examines the phenomenon of spree killing, particularly in a workplace, that became known in the United States as" going postal".
title: Murder by Contract
paragraph_text: Murder by Contract is a 1958 American film noir crime film directed by Irving Lerner. Academy Award- nominated screenwriter Ben Maddow did uncredited work on the film. Centering on an existentialist hit man assigned to kill a woman, the film is often praised for its spare style and peculiar sense of cool. Though not widely seen at the time of its release, it finally appeared on DVD, included in the boxed set" Columbia Pictures Film Noir Classics, Vol. 1( The Big Heat/ 5 Against the House/ The Lineup/ Murder by Contract/ The Sniper)," released November 3, 2009. The film has exerted an influence on American cinema, most notably on director Martin Scorsese, who famously cited" Murder by Contract" as" the film that has influenced[ him] most."
title: Respectable by Proxy
paragraph_text: Respectable by Proxy is a 1920 American silent drama film directed by J. Stuart Blackton and starring Sylvia Breamer, Robert Gordon and William R. Dunn.
title: Murder by Invitation
paragraph_text: Murder by Invitation is a 1941 American murder mystery film directed by Phil Rosen.

Reasoning steps:
Murder by Proxy publication date 1954
Rx Murder publication date 1958

Answer: spans: Murder By Proxy