Question: Which director, John Francis Dillon or Mark L. Lester, was also an actor?
Context: John Francis Dillon (July 13, 1884 – April 4, 1934) was an American film director and actor of the silent era.  He directed 130 films between 1914 and 1934.  He also appeared in 74 films between 1914 and 1931.  He was born in New York, New York, was a brother of Robert A. Dillon, and died in Los Angeles, California from a heart attack. Mark L. Lester (born November 26, 1946) is an American film director, screenwriter, and producer.  He is best known as a prolific director of cult films including the disco musical "Roller Boogie", the vigilante thriller film "Class of 1984", the Stephen King-adaptation "Firestarter" (1984), the Arnold Schwarzenegger action film "Commando" (1985), and the action-comedy "Armed and Dangerous" (1986), starring John Candy, Eugene Levy, and Meg Ryan. Robert A. Dillon (February 13, 1889 – November 28, 1944) was an American screenwriter and film director of the silent era.  He wrote for 81 films between 1914 and 1937.  He also directed eight films between 1916 and 1927.  Dillon was born in New York City, was a brother of director John Francis Dillon, and died in Los Angeles, California. The Noose is a silent film adaptation of the Willard Mack play "The Noose", which was released in 1928.  It stars Richard Barthelmess, Montagu Love, Robert Emmett O'Connor and Thelma Todd.  The movie was adapted by Garrett Graham and James T. O'Donohoe from the play.  It was directed by John Francis Dillon and Richard Barthelmess's performance was nominated for the Academy Award for Best Actor. Millie (1931) is a pre-Code drama film directed by John Francis Dillon from a screenplay by Charles Kenyon and Ralph Morgan, based on a novel of the same name by Donald Henderson Clarke.  The film was an independent production by Charles R. Rogers, distributed by RKO Radio Pictures, after their acquisition of Pathé Exchange.  It starred Helen Twelvetrees in one of her best roles, with a supporting cast which included Lilyan Tashman, James Hall, Joan Blondell, John Halliday and Anita Louise. The Big Shakedown is a 1934 American Pre-Code drama film starring Charles Farrell and Bette Davis, and directed by John Francis Dillon.  The screenplay is based on the story "Cut Rate" by Niven Busch and Samuel G. Engel.  The film also stars Ricardo Cortez and Glenda Farrell and is director John Francis Dillon's final film. The Base is a 1999 action/thriller film written by Jeff Albert and Hesh Rephun, produced by Dana Dubosky and Mark L. Lester, directed by Mark L. Lester and starring Mark Dacascos, Tim Abell and Paula Trickey. John T. Dillon (June 19, 1876 – December 29, 1937) was an American actor of the silent era.  He appeared in 136 films between 1908 and 1936.  He died in Los Angeles, California from pneumonia.  Actor Edward Dillon was his brother.  They are not related to director John Francis Dillon. The Finger Points is a 1931 American Pre-Code drama film directed by John Francis Dillon and written by John Monk Saunders, W.R. Burnett and Robert Lord.  The film stars Richard Barthelmess, Fay Wray, Regis Toomey, Robert Elliott, Clark Gable, Oscar Apfel and Robert Gleckler.  The film was released by Warner Bros. on April 11, 1931. We Moderns (1925) is an American silent comedy film directed by John Francis Dillon and starring Colleen Moore.  The film was produced by Moore's husband John McCormick (1893-1961), was released through First National Pictures.  It was based on the play and novel by Israel Zangwill.  The play ran for 22 performances in 1924 at the Gaiety Theatre (New York), produced and directed by Harrison Grey Fiske and starring Helen Hayes and Isabel Irving.
Answer: John Francis Dillon