Question: Are Dziga Vertov and Cheick Oumar Sissoko film directors?

Context paragraphs:
Genesis (1999 film): Genesis (French: La genèse ) is a 1999 French-Malian drama film directed by Cheick Oumar Sissoko.  It covers chapters 23 to 37 of the biblical Book of Genesis, but with only African actors.  It was screened in the Un Certain Regard section at the 1999 Cannes Film Festival.

Dziga Vertov Group: The Dziga Vertov Group (French: "Groupe Dziga Vertov" ) was formed in 1968 by politically active filmmakers including Jean-Luc Godard and Jean-Pierre Gorin.  Their films are defined primarily for Brechtian forms, Marxist ideology, and a lack of personal authorship.  The group, named after 1920s-'30s Soviet filmmaker Dziga Vertov (1896-1954), was dissolved soon after the completion of 1972's "Letter to Jane".

Kinoks: The Kinoks ("kino-oki," meaning cinema-eyes) were a collective of Soviet filmmakers in 1920s Russia, based most notably around film editor Dziga Vertov (pseudonym Denis Kaufman).  In 1919 Vertov and his future wife, the talented film editor Elizaveta Svilova, plus several other young filmmakers created a group called Kinoks ("kino-oki," meaning cinema-eyes).  In 1922 they were joined by Mikhail Kaufman, who had just returned from the civil war.  From 1922 to 1923 Vertov, Kaufman, and Svilova published a number of manifestos in avant-garde journals which clarified the Kinoks' positions vis-à-vis other leftist groups.

Dziga Vertov: Dziga Vertov (Russian: Дзига Вертов ; born David Abelevich Kaufman, Russian: Дави́д А́белевич Ка́уфман , and also known as Denis Kaufman; 2 January 1896 – 12 February 1954) was a Soviet pioneer documentary film and newsreel director, as well as a cinema theorist.  His filming practices and theories influenced the cinéma vérité style of documentary movie-making and the Dziga Vertov Group, a radical film-making cooperative which was active from 1968 to 1972.

Cheick Oumar Sissoko: Cheick Oumar Sissoko (born 1945 in San, Mali) is a Malian film director and politician.

Enthusiasm (film): Enthusiasm: The Symphony of Donbass [Russian: Энтузиазм: Симфония Донбасса or Entuziazm: Simfoniya Donbassa], also referred to as "Enthusiasm", "Donbass Symphony", or "The Symphony of the Donbas Basin".  "Enthusiasm" is a 1930 Soviet sound film, directed by Dziga Vertov.  Although "Enthusiasm" is not one of Vertov's more popular films, such as Man with a Movie Camera, the film was the director's first sound film and also the first sound film of the Soviet production company Ukrainfilm.  The film is also notable for the fact that it is a documentary filmed on location.  Like many of his other films, Vertov worked on "Enthusiasm" with his wife Elizaveta Svilova.

Balla Moussa Keïta: Balla Moussa Keïta (1934 – March 6, 2001) was a Malian actor and comedian, and a West African cinema pioneer who was well known in the West (especially France).  Born in the Ségou Region of Mali, he was originally a radio producer.  He later turned to acting and acted in a number of movies by notable Mali directors like Cheick Oumar Sissoko, Souleymane Cissé and Abdoulaye Ascofaré.  Among his critically acclaimed roles are those of the tribal king "Rouma Boll" in "Yeelen" and as Mambi in "Guimba, un tyrant, une époque".  He received the Best Male Interpretation award at the FESPACO for his role in the Guinean film "Séré, le témoin".

African Solidarity for Democracy and Independence: African Solidarity for Democracy and Independence (French: "Solidarité Africaine pour la Démocratie et l'Indépendance" ) is a left-wing political party in Mali.  It was founded by Cheick Oumar Sissoko and Oumar Mariko in 1996; Sissoko is the party's President and Mariko is its Secretary-General, the top post in the party.  The party is Pan-Africanist in ideology, is affiliated internationally with the International Communist Seminar, a grouping organised by the Workers Party of Belgium, and is in part an outgrowth of the 1991 demonstrations against the military rule of President Moussa Traoré.  Mariko was head of the Association of Students and Pupils of Mali (AEEM) during the 1991 protest movement which overthrew the government.

A Sixth Part of the World: A Sixth Part of the World (Russian: Шестая часть мира , Shestaya Chast Mira ), sometimes referred to as The Sixth Part of the World, is a 1926 silent film directed by Dziga Vertov and produced by Kultkino (part of Sovkino).  Through the travelogue format, it depicted the multitude of Soviet peoples in remote areas of USSR and detailed the entirety of the wealth of the Soviet land.  Focusing on cultural and economic diversity, the film is in fact a call for unification in order to build a "complete socialist society".  A mix between newsreel and found footage, Vertov edited sequences filmed by eight teams of kinoks ("kinoki") during their trips.  According to Vertov, the film anticipates the coming of sound films by using a constant ""word-radio-theme"" in the intertitles.  Thanks to "A Sixth Part of the World" and his following feature "The Eleventh Year" (1928), Vertov matures his style in which he will excel in his most famous film "Man with a Movie Camera" (1929).

Guimba the Tyrant: Guimba the Tyrant (French: "Guimba, un tyran, une époque" ) is a 1995 Malian comedy drama film in the Bambara language (with some Fula language components), directed by noted Malian director Cheick Oumar Sissoko.  The movie shows the rise and fall of a cruel and despotic village chief "Guimba", and his son "Jangine" in a fictional village in the Sahel of Mali.  Some of the storytelling was done through the medium of the village griot, and with the film being placed in an old setting, lends an epic touch to the movie.  The exact chronological setting of the movie is difficult to ascertain, being set in an isolated village, but the commonly used weaponry shown is the blunderbuss (however one scene outside the village features a neem tree, a species introduced to Africa during the colonial period).  The film depicts some magical components, including a solar eclipse brought on by magic.  Casting was only partially done from among professional actors.

Supporting paragraphs: Dziga Vertov Cheick Oumar Sissoko
Answer: yes