Question: Bertrand Tavernier and Charles Giblyn, have which mutual occupations?

Context paragraphs:
Nils Tavernier: Nils Tavernier (born 1 September 1965) is a French actor and director.  He is best known for his film appearances in "Beatrice" (1987), "Valmont" (1988), and "Revenge of the Musketeers" (1993), and for his directorial efforts "The Other Side of the Tracks" (1997), "Etoiles: Dancers of the Paris Opera Ballet" (2001), and "Les enfants de Thiès" (2001).  He is the son of film director Bertrand Tavernier.

Dans la Nuit (Louis Sclavis album): Dans la Nuit is an album by French clarinetist Louis Sclavis recorded in 2000 and released on the ECM label.  The album was initialised through an invitation of French director Bertrand Tavernier to Sclavis, he agreed and wrote this music to Charles Vanel’s 1929 film “Dans la nuit”.

Bertrand Tavernier: Bertrand Tavernier (born 25 April 1941) is a French director, screenwriter, actor and producer.

Safe Conduct: Safe Conduct (French: Laissez-passer ) is a 2002 French historical drama film directed by Bertrand Tavernier and written by Tavernier and Jean Cosmos.

Beatrice (film): Beatrice (French:La passion Béatrice, Italian:Quarto comandamento) is a 1987 French-Italian historical drama film directed by Bertrand Tavernier and starring Bernard-Pierre Donnadieu, Julie Delpy and Nils Tavernier.

Round Midnight (film): Round Midnight is a 1986 American-French musical drama film directed by Bertrand Tavernier and written by Tavernier and David Rayfiel.  It stars Dexter Gordon, François Cluzet and Herbie Hancock.  Martin Scorsese, Philippe Noiret and Wayne Shorter appear in cameos.

The Oubliette: The Oubliette is a 1914 American silent drama film directed by Charles Giblyn, featuring Murdock MacQuarrie, Pauline Bush, and Lon Chaney.  It is part of a four-film series directed by Giblyn called the "The Adventures of François Villon".  "The Oubliette" is based on a short story of the same name by George Bronson Howard published in "The Century Magazine".  This film and "By the Sun's Rays" are two of Lon Chaney's earliest surviving films.

Charles Giblyn: Charles Giblyn (September 6, 1871 – March 14, 1934) was an American film director and actor of the silent era.  He directed 96 films between 1912 and 1927.  He also appeared in 23 films between 1914 and 1934.  He was one of the founders of the Motion Picture Directors Association.  Founded Albion Productions, a film production company, in 1922.  He was born in Watertown, New York and died in Los Angeles, California.

The Clockmaker: The Clockmaker (French: L'Horloger de Saint-Paul , also known as The Clockmaker of St. Paul and The Watchmaker of St. Paul) is a 1974 French crime drama film directed by Bertrand Tavernier.  Based on the novel "L'Horloger d'Everton" by Georges Simenon, it tells the story of a widowed father who first discovers how little he knows about his teenage son, who kills a man and with his girl goes on the run, but then decides that whatever their faults he will stand by the pair.

Holy Lola: Holy Lola is a 2004 French drama film that is directed by Bertrand Tavernier.  Tavernier said that the film was very, very moving, very exciting to do, and it made him fall in love with Cambodia.

Supporting paragraphs: Bertrand Tavernier Charles Giblyn
Answer: film director and actor