Question: What profession do Robert Mulligan and David Lean share?

Context paragraphs:
David Lean Cinema: The David Lean Cinema is a small cinema built in Croydon, London, in the 1990s, to honour the director David Lean, who was born in the town.  It is located within the Croydon Clocktower arts complex on Katharine Street.

The Rat Race: The Rat Race is a 1960 American drama film directed by Robert Mulligan and starring Tony Curtis and Debbie Reynolds as struggling young entertainment professionals in New York City.  Filming took place in Pittsburgh, Pennsylvania.  Sam Butera and Gerry Mulligan have minor roles as saxophonists.

Robert Mulligan: Robert Patrick Mulligan (August 23, 1925 – December 20, 2008) was an American film and television director best known as the director of humanistic American dramas, including "To Kill a Mockingbird" (1962), "Summer of '42" (1971), "The Other" (1972), "Same Time, Next Year" (1978) and "The Man in the Moon" (1991).  He was also known in the 1960s for his extensive collaborations with producer Alan J. Pakula.  He was the elder brother of actor Richard Mulligan.

Oliver Twist (1948 film): Oliver Twist is a 1948 British film and the second of David Lean's two film adaptations of Charles Dickens novels.  Following the success of his 1946 version of "Great Expectations", Lean re-assembled much of the same team for his adaptation of Dickens' 1838 novel, including producers Ronald Neame and Anthony Havelock-Allan, cinematographer Guy Green, designer John Bryan and editor Jack Harris.  Lean's then-wife, Kay Walsh, who had collaborated on the screenplay for "Great Expectations", played the role of Nancy.  John Howard Davies was cast as Oliver, while Alec Guinness portrayed Fagin.

The Pursuit of Happiness (1971 film): The Pursuit of Happiness is a 1971 American drama film about a student who goes on the run to avoid serving his full prison sentence for vehicular manslaughter.  The film was directed by Robert Mulligan.  The producer was David Susskind and the associate producer, Alan Shayne.  The screenplay was written by Jon Boothe and George L. Sherman.

Richard Mulligan: Richard Mulligan (November 13, 1932 – September 26, 2000) was an American television, film and character actor known for his role as Burt Campbell, the loving, preventive husband of Cathryn Damon's character, in the sitcom "Soap" (1977–81) and later for his starring role as Dr. Harry Weston in "Empty Nest" (1988–95).  He was the younger brother of film director Robert Mulligan.

The Sound Barrier: The Sound Barrier (known in the United States, as Breaking Through the Sound Barrier and Breaking the Sound Barrier) is a British 1952 film directed by David Lean.  It is a fictional story about attempts by aircraft designers and test pilots to break the sound barrier.  It was David Lean's third and final film with his wife Ann Todd, but it was his first for Alexander Korda's London Films following the break-up of Cineguild.  "The Sound Barrier" stars Ralph Richardson, Ann Todd, and Nigel Patrick.

Robert Surtees (cinematographer): Robert L. Surtees, A.S.C. (August 9, 1906 – January 5, 1985) was an American cinematographer who won three Academy Awards for the films "King Solomon's Mines", "The Bad and the Beautiful" and the 1959 version of "Ben Hur".  Surtees has worked at various studios, including Universal, UFA, Warner Brothers, and MGM alongside directors such as Robert Mulligan, Peter Bogdanovich, and Vincente Minnelli gaining him a reputation as one of the most versatile cinematographers to date.

David Lean: Sir David Lean, CBE (25 March 190816 April 1991) was an English film director, producer, screenwriter and editor, responsible for large-scale epics such as "The Bridge on the River Kwai" (1957), "Lawrence of Arabia" (1962) and "Doctor Zhivago" (1965).  He also directed adaptations of Dickens novels "Great Expectations" (1946) and "Oliver Twist" (1948), as well as the romantic drama "Brief Encounter" (1945).

David Lean filmography: The following is a filmography of David Lean, whose body of work in the film industry spanned the period from 1930–1984.  This list includes the release year of the film, the role(s) Lean had in the production of each film, and additional notes such as awards and nominations.  Lean directed 17 feature films in total.

Supporting paragraphs: Robert Mulligan David Lean
Answer: film director