Question: Charles Brabin and David Lean, have which mutual occupations?

Context paragraphs:
Stella Maris (1925 film): Stella Maris is a 1925 silent film directed by Charles Brabin, written by Mary Alice Scully and based on a William J. Locke's novel.  The film is a remake of the 1918 version, starring Mary Pickford.

Charles Brabin: Charles J. Brabin (April 17, 1882 – November 3, 1957) was an American film director and screenwriter.

Twinkletoes: Twinkletoes is a 1926 silent film romantic drama directed by Charles Brabin and starring Colleen Moore.  The film, as with most of Moore's vehicles at this time, was produced by her husband John McCormick with the couple distributing through Moore's resident studio First National.  This film is one of Moore's surviving films from the late silent era and is available on DVD.

The Valley of the Giants (1927 film): The Valley of the Giants is a 1927 silent film adventure directed by Charles Brabin and starring Milton Sills and Doris Kenyon who were real-life man and wife.  It was based on a novel by Peter B. Kyne.  First National produced and distributed the film having gained the screen rights to the story from Famous Players-Lasky and Paramount.  Paramount had made a version of the novel in 1919 with Wallace Reid.  A copy of this film survives at the UCLA Film and Television Archive.  It is also listed as existing in an incomplete print at the Library of Congress.

A Wicked Woman: A Wicked Woman is a 1934 drama film starring Mady Christians as a woman who kills her abusive husband to protect her family and builds a new life to raise their four children.  It was directed by Charles Brabin and also starred Jean Parker and Charles Bickford.  It was based on the novel "Wicked Woman" by Anne Austin.

Mismates: Mismates is a 1926 silent film starring Doris Kenyon and Warner Baxter.  The movie was written by Sada Cowan from a play by Myron C. Fagan and directed by Charles Brabin.  This film is now lost.

Blind Wives: Blind Wives is a 1920 American silent drama film produced and distributed by Fox Film Corporation and directed by Charles Brabin.  The film reunites director Brabin with the stars of his previous success "While New York Sleeps", Marc McDermott and Estelle Taylor.  The film is based on a 1914 Broadway stage play by Edward Knoblock, "My Lady's Dress" which starred Mary Boland.  This film survives in prints held by George Eastman House and by the Library of Congress.

Burning Daylight (1928 film): Burning Daylight is a 1928 silent dramatic action adventure film directed by Charles Brabin and starring Milton Sills and Doris Kenyon, a real-life married couple.  It was produced and distributed by First National Pictures and based on a novel by Jack London.  It was previously filmed by Metro Pictures in 1920.

While New York Sleeps: While New York Sleeps is a 1920 American crime drama film produced by Fox Film Corporation and directed by Charles Brabin, who was the husband of actress Theda Bara.  The film tells three distinct episodic stories using the same actors, Estelle Taylor and Marc McDermott.  Long thought to be a lost film like many other Fox Film productions from this period, a copy of this movie is now in the collection of the UCLA Film and Television Archive.

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).

Supporting paragraphs: Charles Brabin David Lean
Answer: film director and screenwriter