Question: Which star of The Man Who Knew Too Much was an American actor and military officer?

full_context: Document 1: The 39 Steps (1935 film): The 39 Steps is a 1935 British thriller film directed by Alfred Hitchcock, starring Robert Donat and Madeleine Carroll. Very loosely based on the 1915 adventure novel "The Thirty-Nine Steps" by John Buchan, the film is about an everyman civilian in London, Richard Hannay, who becomes caught up in preventing an organization of spies called the 39 Steps from stealing British military secrets. After being mistakenly accused of the murder of a counter-espionage agent, Hannay goes on the run to Scotland with an attractive woman in the hopes of stopping the spy ring and clearing his name.
Document 2: Montgomery Clift: Edward Montgomery "Monty" Clift ( ; October 17, 1920July 23, 1966) was an American film and stage actor. "The New York Times"’ obituary of Clift noted his portrayal of "moody, sensitive young men". He is best remembered for roles in "Red River" (1948), "The Heiress" (1949), George Stevens's "A Place in the Sun" (1951), as a Catholic priest in Alfred Hitchcock's "I Confess" (1952), as the self-destructive soldier Prewitt in Fred Zinnemann's "From Here to Eternity" (1953), in Edward Dmytryk's "The Young Lions" (1958), and as a mentally challenged, sterilized concentration camp survivor in Stanley Kramer's "Judgment at Nuremberg" (1961). He received four Academy Award nominations during his career: three for Best Actor and one for Best Supporting Actor.
Document 3: James Garner: James Garner (born James Scott Bumgarner; April 7, 1928 – July 19, 2014) was an American actor, producer, and voice artist. He starred in several television series over more than five decades, including such popular roles as Bret Maverick in the 1950s western comedy series "Maverick" and Jim Rockford in "The Rockford Files", and played leading roles in more than 50 theatrical films, including "The Great Escape" (1963) with Steve McQueen, Paddy Chayefsky's "The Americanization of Emily" (1964), "Grand Prix" (1966), Blake Edwards' "Victor/Victoria" (1982), "Murphy's Romance" (1985), for which he received an Academy Award nomination, "Space Cowboys" (2000) with Clint Eastwood, and "The Notebook" (2004).
Document 4: North by Northwest: North by Northwest is a 1959 American thriller directed by Alfred Hitchcock and starring Cary Grant, Eva Marie Saint and James Mason. The screenplay was by Ernest Lehman, who wanted to write "the Hitchcock picture to end all Hitchcock pictures".
Document 5: Cary Grant: Cary Grant (born Archibald Alec Leach; January 18, 1904 – November 29, 1986) was a British-American actor, known as one of classic Hollywood's definitive leading men. He began a career in Hollywood in the early 1930s, and became known for his transatlantic accent, debonair demeanor, and light-hearted approach to acting and sense of comic timing. He became an American citizen in 1942.
Document 6: The Man Who Knew Too Much (1956 film): The Man Who Knew Too Much is a 1956 American suspense thriller film noir directed by Alfred Hitchcock, starring James Stewart and Doris Day. The film is Hitchcock's remake of his own 1934 film of the same name.
Document 7: The 39 Steps (1959 film): The 39 Steps is a 1959 British thriller film produced by Betty Box, directed by Ralph Thomas and starring Kenneth More and Taina Elg. It is a remake of the 1935 Alfred Hitchcock film, loosely based on the novel "The Thirty-Nine Steps" by John Buchan.
Document 8: John Wayne: Marion Mitchell Morrison (born Marion Robert Morrison; May 26, 1907 – June 11, 1979), known professionally as John Wayne and nicknamed Duke, was an American actor and filmmaker. An Academy Award-winner for "True Grit" (1969), Wayne was among the top box office draws for three decades.
Document 9: James Stewart: James Maitland "Jimmy" Stewart (May 20, 1908July 2, 1997) was an American actor and military officer who is among the most honored and popular stars in film history. A major Metro-Goldwyn-Mayer contract player, Stewart was known for his distinctive drawl and down-to-earth persona, which helped him often portray American middle-class men struggling in crisis. Many of the films he starred in have become enduring classics.
Document 10: The Story of G.I. Joe: The Story of G.I. Joe, also credited in prints as "Ernie Pyle's Story of G.I. Joe", is a 1945 American war film directed by William Wellman, starring Burgess Meredith and Robert Mitchum. The film was nominated for four Academy Awards, including Mitchum's only nomination for Best Supporting Actor. This was the film that established him as one of the world's biggest movie stars.
Document 11: The Man Who Knew Too Little: The Man Who Knew Too Little is a 1997 American-German spy comedy film starring Bill Murray, directed by Jon Amiel, and written by Robert Farrar and Howard Franklin. The film is based on Farrar's novel "Watch That Man", and the title is a parody of Alfred Hitchcock's 1934 film "The Man Who Knew Too Much" and his 1956 remake of the same title.
Document 12: Film career of Audie Murphy: Audie Murphy (20 June 1925 – 28 May 1971) was a highly decorated American soldier and Medal of Honor recipient who turned actor. He portrayed himself in the film ""To Hell and Back"", the account of his World War II experiences. During the 1950s and 1960s he was cast primarily in westerns. While often the hero, he proved his ability to portray a cold-blooded hired gun in "No Name on the Bullet". A notable exception to the westerns was "The Quiet American" in which he co-starred with Michael Redgrave. Murphy made over 40 feature films and often worked with directors more than once. Jesse Hibbs who directed "To Hell and Back" worked with the star on six films, only half of which were westerns. When promoting his 1949 book "To Hell and Back" he appeared on the radio version of "This Is Your Life". To promote the 1955 film of the same name, he appeared on Ed Sullivan's "Toast of the Town". He was a celebrity guest on television shows such as "What's My Line?" and appeared in a handful of television dramas. Murphy's only television series "Whispering Smith" had a brief run in 1961. For his cooperation in appearing in the United States Army's "Broken Bridge" episode of "The Big Picture" television series he was awarded the Outstanding Civilian Service Medal.
Document 13: Audie Murphy honors and awards: Audie Murphy (20 June 1925 – 28 May 1971) was one of the most decorated United States Army combat soldiers of World War II, serving from 1942 to 1945. He received every American combat award for valor available at the time of his service, including the Medal of Honor. He also received recognitions from France and Belgium. With his 1945 military discharge at the end of the war, Murphy became an advocate of treatment for post-traumatic stress disorder in veterans. The Audie L. Murphy Memorial VA Hospital in San Antonio and the Sergeant Audie Murphy Clubs (SAMC) on military bases honor his contributions. He joined the Texas National Guard in 1950, transferring to reserve status in 1956 and remaining in the Guard until 1969. He also had a civilian career as a film actor and songwriter. Recognitions he received both during his lifetime and posthumously are listed below.
Document 14: Sabotage (1936 film): Sabotage, also released as The Woman Alone, is a 1936 British espionage thriller film directed by Alfred Hitchcock and starring Sylvia Sidney, Oskar Homolka, and John Loder. It is loosely based on Joseph Conrad's novel "The Secret Agent", about a woman who discovers that her husband is an agent terrorist. "Sabotage" should not be confused with Hitchcock's film "Secret Agent", also released in 1936, but based on the stories of W. Somerset Maugham
Document 15: The Girl Who Knew Too Much (1969 film): The Girl Who Knew Too Much is a 1969  neo noir film starring Adam West as Johnny Cain, a nightclub owner and former freelance adventurer who is forced out of retirement when a crime syndicate boss is murdered in his nightclub and investigations lead into unexpected areas. It was the final film of director Francis D. Lyon and United Pictures Corporation.
ground_truth: James Maitland