Question: Which actor, who stars in the 1926 silent film comedy directed by William A. Seiter, was an amateur boxing champion?

full_context: Document 1: What Happened to Jones: What Happened to Jones is a 1926 silent film comedy directed by William A. Seiter and starring Reginald Denny. It was produced and distributed by Universal Pictures. The film is taken from an 1897 Broadway play, "What Happened to Jones" by George Broadhurst.
Document 2: Reginald Owen: John Reginald Owen (5 August 1887 – 5 November 1972) was a British character actor. He was known for his many roles in British and American films and later in television programmes.
Document 3: F. Richard Jones: Frank Richard Jones (September 7, 1893 – December 14, 1930) was an American director and producer.
Document 4: Reginald D. Hunter: Reginald Darnell Hunter (born 26 March 1969) is an American stand-up comedian based in the United Kingdom.
Document 5: Where Was I? (film): Where Was I? is a 1925 silent film comedy directed by William A. Seiter and starring Reginald Denny. It was produced and distributed by Universal Pictures under their Jewel banner.
Document 6: Reginald Doherty: Reginald "Reggie" or "R. F." Frank Doherty (14 October 1872 – 29 December 1910) was a British tennis player and the older brother of tennis player Laurence Doherty. He was known in the tennis world as "R.F." rather than "Reggie". He was a four-time Wimbledon singles champion and a triple Olympic Gold medalist in doubles and mixed doubles.
Document 7: What Happened Was: What Happened Was... is a 1994 American independent film written for the screen, directed by and starring Tom Noonan. It is an adaptation of Noonan's original stage play of the same name.
Document 8: Reginald Denny (actor): Reginald Denny (born Reginald Leigh Dugmore, 20 November 1891 – 16 June 1967) was an English stage, film and television actor as well as an aviator and UAV pioneer. He was once an amateur boxing champion of Great Britain.
Document 9: Reginald Barker: Reginald C. Barker (April 2, 1886 – February 23, 1945) was a pioneer film director.
Document 10: Richard Attenborough: Richard Samuel Attenborough, Baron Attenborough, {'1': ", '2': ", '3': ", '4': "} ( ; 29 August 1923 – 24 August 2014) was an English actor, filmmaker, entrepreneur, and politician. He was the President of the Royal Academy of Dramatic Art (RADA) and the British Academy of Film and Television Arts (BAFTA). Attenborough joined the Royal Air Force during World War II and served in the film unit. He went on several bombing raids over Europe and filmed action from the rear gunner's position.
Document 11: Daniel V. Jones: Daniel Victor Jones (April 15, 1958 April 30, 1998) was an American man who committed suicide on a Los Angeles freeway in 1998. The incident is well known, as his suicide was broadcast on live television by news helicopters. Jones committed suicide as a form of protest towards HMOs, after being diagnosed as HIV-positive. Footage of his suicide was shown in the 2002 documentary film, "Bowling for Columbine".
Document 12: Rolling Home (1926 film): Rolling Home is a 1926 silent film comedy directed by William A. Seiter and starring Reginald Denny. It was produced and distributed by Universal Pictures.
Document 13: Johnny Dundee: Johnny "Scotch Wop" Dundee (November 19, 1893 – April 22, 1965) was a featherweight and junior lightweight champion boxer who fought from 1910 until 1932. He was born Giuseppe Curreri in Sciacca, Sicily, but was raised in the United States. Though Dundee was a clever boxer with little knockout power, he was highly skilled at fighting off the ropes and was always in outstanding condition. Statistical boxing website BoxRec lists Dundee as the #3 ranked featherweight of all time, while "The Ring Magazine" founder Nat Fleischer placed him at #4. The International Boxing Research Organization rates Dundee as the 5th best featherweight ever and boxing historian Bert Sugar placed him 32nd in his Top 100 Fighters catalogue. Dundee was elected to the Ring Magazine Hall of Fame in 1957 and the International Boxing Hall of Fame in 1991.
Document 14: Brown of Harvard (1926 film): Brown of Harvard is a 1926 American silent film directed by Jack Conway and starring William Haines, Jack Pickford, and Mary Brian. Released by Metro-Goldwyn-Mayer, the film is based on the successful 1906 Broadway play "Brown of Harvard" by Rida Johnson Young who also co-wrote the popular music for the play along with Melvin Ellis. The film is the best known of the three "Brown of Harvard" films, presenting the screen debut of John Wayne. Uncredited, Wayne played a Yale football player. Grady Sutton and Robert Livingston, both of whom went on to long and successful careers, also appear uncredited. The 1918 film included future Boston Redskins coach William "Lone Star" Dietz and the only Washington State University football team to win a Rose Bowl.
Document 15: Reginald Denham: Reginald Denham (10 January 1894 – 4 February 1983) was an English writer, theater and film director, actor and film producer.
ground_truth: Reginald Denny