Question: Which famous film director, French film director Julien Duvivier or Egyptian film director Youssef Chahine, won the Cannes 50th Anniversary Award for lifetime achievement?

Context paragraphs:
Le Chaos: Le Chaos (also known as English: This Is Chaos , Arabic: هي فوضى‎ ‎ "Heya Fawda") is the final film from the Egyptian director Youssef Chahine.

Sira` Fi al-Mina: Sira` Fi al-Mina    (Arabic: صراع في الميناء‎ ‎ , English: Struggle in the Pier , but also titled Obscure Waters in later releases, French: Les Eaux Noirs ) is a 1956 Egyptian romance/crime/drama film directed by the acclaimed Egyptian film director Youssef Chahine.  It starred Omar Sharif, Ahmed Ramzy, and Faten Hamama.

Emad El Bahat: Emad Atiya Ali El-Bahat (born 20 May 1970), is an Egyptian film director and screenwriter, also works as assistant for advertisements, documentaries and several shootings of foreign films in Egypt.  Emad Elbahat's passion to cinema industry led him, fortunately, to meet three of the best and most important filmmakers in Egypt, Youssef Chahine, actually, Elbahat is the most influenced by, Daoud Abd El-Sayyed and Yousri Nasr Allah.

Youssef Chahine: Youssef Chahine (Arabic: يوسف شاهين‎ ‎ ; 25 January 1926 – 27 July 2008) was an Egyptian film director, he was active in the Egyptian film industry from 1950 until his death.  A winner of the Cannes 50th Anniversary Award (for lifetime achievement), Chahine was credited with launching the career of actor Omar Sharif.  A critically acclaimed director frequently seen in film festivals during the earlier decades of his work, Chahine reached wider international audiences as one of the co-directors of "11'9"01 September 11".

They Were Five: La belle équipe is a 1936 French film directed by Julien Duvivier.  The script was written by Duvivier and Charles Spaak.  Maurice Yvain provided the score.  Jean Gabin's song "Quand on s'promène au bord de l'eau" was written by Duvivier, Yvain and Louis Poterat.  Interiors were shot at the Studios de Joinville in Joinville-le-Pont, Val-de-Marne, with exteriors at Chennevières-sur-Marne.  The film is also known as "They Were Five".

The Blazing Sun (1954 film): The Blazing Sun    (Arabic: صراع في الوادي‎ ‎ , Ṣira‘ Fī al-Wādī ) is a 1954 Egyptian romance/drama film directed by Egyptian film director Youssef Chahine and written by Helmy Halim and Ali El Zorkani.  It starred Omar Sharif and Faten Hamama.  This was the first film role that Omar Sharif played.  In 1996, during the Egyptian Cinema centennial, this film was selected one of the best 150 Egyptian film productions.  It was presented in the 1954 Cannes Film Festival under the name "The Blazing Sky".

Julien Duvivier: Julien Duvivier (] ; 8 October 1896, Lille – 29 October 1967, Paris) was a French film director.  He was prominent in French cinema in the years 1930-1960.  Amongst his most original films, chiefly notable are "La Bandera", "Pépé le Moko", "Panique", "Voici le temps des assassins" and "".

Alexandria Again and Forever: Alexandria again and forever (French: Alexandrie Encore et Toujours) is the final entry in a trilogy of films by director Youssef Chahine.  This 104-minute-long film is mainly in Arabic, with English-language subtitles.  It was preceded by the films "Alexandra...Why? " (1978) and "An Egyptian Story" (1982).  The film was selected as the Egyptian entry for the Best Foreign Language Film at the 63rd Academy Awards, but was not accepted as a nominee.

Ibn el Nil: Ibn el-Nil (Arabic: ابن النيل‎ ‎ , "Son of the Nile")    is a 1951 Egyptian drama film directed by Youssef Chahine.  It starred Yehia Chahine, Faten Hamama, Mahmoud el-Meliguy, and Shukry Sarhan and was chosen as one of the best 150 Egyptian film productions in 1996, during the Egyptian Cinema centennial.  The film received an award from the New Delhi International Film Festival and was nominated for the Prix International award at the 1952 Cannes Film Festival and an award in the Venice International Film Festival.

Al-Mohager: Al-Mohager (The Emigrant) is an acclaimed and controversial 1994 Egyptian film by Youssef Chahine.

Supporting paragraphs: Julien Duvivier Youssef Chahine
Answer: Youssef Chahine