Question: Crossing the Line was directed by Peter Jackson, and had an additional director who was what South African film director who is best known for District 9?

Context paragraphs:
Greg Broadmore: Greg Broadmore is a concept designer, artist, writer and sculptor based in Wellington, New Zealand.  He is the creator of Dr Grordbort’s, and has worked as a designer, artist and writer at "The Lord of the Rings" film franchise director Peter Jackson’s award-winning special effects and prop company, Weta Workshop since 2002.  He was the lead concept designer on District 9 and a concept designer and sculptor on King Kong, and The Adventures of Tintin.  Broadmore was also one of the illustrators and concept writers for Weta Workshop’s first publication, “The World of Kong: A Natural History of Skull Island.

Namibia: The Struggle for Liberation: Namibia: The Struggle for Liberation is a 2007 epic film on the Namibian independence struggle against South African occupation as seen through the life of Sam Nujoma, the leader of the South West Africa People's Organisation and the first president of the Republic of Namibia.  The film was written and directed by Charles Burnett, the African American filmmaker, and stars Carl Lumbly and Danny Glover.  The production was financed by the government of Namibia.  Music composed by Stephen James Taylor won the award for Best Music Score at the Kuala Lumpur International Film Festival where the film also won for Best African Film and for Best Director.

David James (actor, born 1972): David James (born 28 October 1972) is a South African film, theatre, and television actor known mainly for playing the villainous Koobus Venter in the 2009 Oscar-nominated science fiction film "District 9 ".  He is also known to South African audiences for his 2004-2006 appearance as "Mad Dog" on the long-running soap opera "Isidingo", for his portrayal as Joel Joffe in the large-scale and well-received 2010 and 2011 stage productions of "Rivonia Trial", and for his current role as radio station manager Hermanus Meyer on the soap opera "Rhythm City".

Carolynne Cunningham: Carolynne Cunningham is an Australian film producer and assistant director most known for her collaborations with director Peter Jackson, producing such films as "King Kong" (2005), "District 9" (2009), "The Lovely Bones" (2009), and the epic fantasy film series "The Hobbit" (2012–2014).  She also served as assistant director on such notable films as "Shine" (1996), "Pitch Black" (2000), "Peter Pan" (2003), "King Kong", "The Lovely Bones", and all three entries in "The Lord of the Rings" trilogy (2001, 2002, and 2003).

Yolandi Visser: Anri du Toit (better known by her stage name Yo-Landi Visser), is a South African film actress and the female vocalist in the electronic group Die Antwoord.  Visser appeared in the 2015 South African film "Chappie".

Crossing the Line (2008 film): Crossing the Line is a 2008 war short film written and directed by Peter Jackson set in World War I.  It is the first film made with the Red One camera.  The film has no dialog apart from the incidental speech of background characters.  Neill Blomkamp serves as additional director.

Neill Blomkamp: Neill Blomkamp (] ; born 17 September 1979) is a South African film director, film producer, screenwriter, and animator.  Blomkamp employs a documentary-style, hand-held, cinéma vérité technique, blending naturalistic and photo-realistic computer-generated effects.  He is best known as the co-writer and director of the critically acclaimed and financially successful science fiction film "District 9", for which he was nominated for the Academy Award for Best Adapted Screenplay.  He also directed the dystopian science fiction film "Elysium", which garnered moderately positive reviews and a good box office return.  He is also known for his collaborations with South African actor Sharlto Copley.  He is based in Vancouver, British Columbia.

Sibs Shongwe-La Mer: Sibs Shongwe- La Mer (born 11 September 1991) is a screenwriter, film director, musician, TED (conference) talks alumni and visual artist born in Johannesburg, South Africa.  His critically acclaimed debut feature film, Necktie Youth premiered in the Panorama section of the 65th Berlin International Film Festival, Tribeca Film Festival, Sydney Film Festival and numerous top tier international film festivals, winning "Best South African Feature Film" and "Best Direction" at the Durban International Film Festival in 2015.  The film went on to garner a multitude of awards including "Best Achievement in Cinematography" and "Best Achievement in editing" at the 2015 South African Film and Television Awards.  Necktie Youth was theatrically released in South Africa (2015) at Ster-Kinekor and on the iTunes Store & DStv Box-office.  The film was later released in the Netherlands, Brazil & American VOD between 2016-2017.  Mid 2016, Shongwe-La Mer signed representation contracts with top London film lit agency Casarotto Ramsey & Associates  , Rick Yorn's legendary LBI entertainment & Hollywood heavy weight CAA.

Katinka Heyns: Katinka Heyns (born September 20, 1947) is a South African actress, director and filmmaker in the South African film industry.  She is known for including feminist perspectives in her films, as well as commenting on South African politics and culture.  Her work includes the film "Paljas" which was nominated for Best Foreign Language Film at the 70th Academy Awards.

District 9: District 9 is a 2009 science fiction film directed by Neill Blomkamp, written by Blomkamp and Terri Tatchell, and produced by Peter Jackson and Carolynne Cunningham.  It is a co-production of New Zealand, the United States, and South Africa.  The film stars Sharlto Copley, Jason Cope, and David James, and was adapted from Blomkamp's 2006 short film "Alive in Joburg".

Supporting paragraphs: Crossing the Line (2008 film) Neill Blomkamp
Answer: Neill Blomkamp