Daniel Mann, also known as Daniel Chugerman (August 8, 1912 – November 21, 1991), was an American film and television director.
Maurice Pialat (] ; 31 August 1925 – 11 January 2003) was a French film director, screenwriter and actor noted for the rigorous and unsentimental style of his films.
 His work is often described as being "realist", though many film critics acknowledge that it does not fit the traditional definition of realism.
À nos Amours.
 (] , "For Our Loves") is a 1983 French drama film directed by Maurice Pialat, written by Arlette Langmann and Pialat.
Naked Childhood (French: L'Enfance nue ) is a 1968 French film.
 It was the feature-length debut of director Maurice Pialat, and was written by Pialat and Arlette Langmann.
 François Truffaut was one of the film's producers.
Arlette Langmann (born on April 3, 1946) is a French screenwriter, film editor and production designer.
 Born in Paris to Jewish immigrant parents from Romania and Poland, Langmann is best known for her long-running collaborations with her brother Claude Berri, Maurice Pialat, and Philippe Garrel.
Le Garçu is a 1995 French drama film directed by Maurice Pialat and starring Gérard Depardieu.
 It was Pialat's final work.
 Pialat was dissatisfied with the movie and even planned to re-edit it, but his failing health made that impossible.
The 40th Cannes Film Festival was held from 7 to 19 May 1987.
 The Palme d'Or went to the "Sous le soleil de Satan" by Maurice Pialat, a choice which was considered "highly controversial" and the prize was given under the jeers of the public.
 Pialat is quoted to have retorted "You don’t like me?
 Well, let me tell you that I don’t like you either!"
Under the Sun of Satan (French: Sous le soleil de Satan ) is a 1987 French drama film directed by Maurice Pialat, starring Gérard Depardieu, Sandrine Bonnaire and Pialat.
 It is based on the 1926 novel of the same name by Georges Bernanos, and tells the story of a devout priest who becomes involved with a murderess.
 The film is about mysticism and divine grace.
The Mouth Agape (French: La gueule ouverte ) is a 1974 French drama film directed by Maurice Pialat.
 It depicts, in a cinematic realist fashion, a woman going through a terminal illness and also dealing with the tumorous lives of her husband and son.
 It was one of the least commercially successful of Pialat's films.
 It was the third film of the ten that he directed before his death in January 2003.
 It is also known under the titles The Gaping Mouth and The Gaping Maw.
Loulou is a 1980 French drama film directed by Maurice Pialat, starring Isabelle Huppert and Gérard Depardieu.
 For "Loulou", Pialat was nominated for the Golden Palm award at the 1980 Cannes Film Festival.

Question: Daniel Mann and Maurice Pialat, have which mutual occupation?
Answer: film director