Question: Which South African professional boxer did  Cedric Kushner managed 

Context paragraphs:
Nkosinathi Joyi: Nkosinathi Joyi (born 1 January 1983 in Mdantsane, South Africa), is a South African professional boxer with a southpaw stance who goes by the nickname of "Mabere".  Joyi is the former IBF Minimumweight world champion, he was ranked by BoxRec and "The Ring Magazine" as the number one boxer in the Minimumweight division.

Mike Holt: Mike Holt (15 September 1931 – 19 July 2008) born Antione Michael Holthausen in Pretoria was a South African professional middle/light heavy/heavyweight boxer of the 1950s and '60s who won the South African middleweight title, and South African light heavyweight title, and drew with Johnny Halafihi for the vacant British Commonwealth light heavyweight title, and was a challenger for the British Empire middleweight title against Pat McAteer, and British Empire light heavyweight title against Yvon Durelle, his professional fighting weight varied from 151+1/2 lb , i.e. middleweight to 185 lb , i.e. heavyweight, he was managed by Piet Lourens.

Jake Tuli: Jake Tuli (7 July 1931 – 24 November 1998) born Jacob Ntuli in Johannesburg was a South African professional fly/bantam/featherweight boxer of the 1950s and 1960s who won the Transvaal (South Africa) (Non White) flyweight title, South African (Non White) bantamweight title, South African (Non White) flyweight title, and British Empire flyweight title, and was a challenger for the British Empire bantamweight title against Peter Keenan, his professional fighting weight varied from 110+1/2 lb , i.e. flyweight to 123+1/2 lb , i.e. featherweight.

Corrie Sanders: Cornelius Johannes "Corrie" Sanders (7 January 1966 – 23 September 2012) was a South African professional boxer who competed from 1989 to 2008.  He won the WBO heavyweight title in 2003 after stopping Wladimir Klitschko in two rounds, which was considered one of the biggest upsets in heavyweight boxing history; "The Ring" magazine named it the Upset of the Year.  In 2004, having vacated the WBO title, Sanders faced Wladimir's brother Vitali Klitschko in an unsuccessful challenge for the vacant WBC and "Ring" heavyweight titles.

Cedric Kushner: Cedric Kushner (July 18, 1948 – January 29, 2015) was a South African-born American boxing promoter and manager.  In the late 1990s he was one of the most significant promoters in the sport.  Boxers he promoted and/or managed included Hasim Rahman, Shannon Briggs, Oleg Maskaev, Chris Byrd, Corrie Sanders, Ike Ibeabuchi and David Tua.

Ben Foord: Ben Foord (21 January 1913, in Vrede – 29 September 1942) was a South African professional light heavy/cruiser/heavyweight boxer of the 1930s and 1940s, who won the South African heavyweight title, British Boxing Board of Control (BBBoFC) British heavyweight title (though he was South African), and British Empire heavyweight title, his professional fighting weight varied from 170 lb , i.e. Light heavyweight to 216 lb , i.e. Heavyweight.  After retiring from boxing, Ben Foord joined the army, and while at home on leave he was playing a practical joke by sneaking up on his wife Phyllis with a pistol and pretending to be a desperado, Foord then attempted Gunspinning in the American frontier style and accidentally shot himself in the face, killing himself.

Dennis Adams (boxer): Dennis Adams (26 December 1934 — 14 January 1971) born in Mayfair, Johannesburg was a South African professional fly/bantam/featherweight boxer of the 1950s and '60s who won the Transvaal (South Africa) (White) bantamweight title, South African flyweight title, South African bantamweight title, and British Empire flyweight title, his professional fighting weight varied from 109+3/4 lb , i.e. flyweight to 123+1/2 lb , i.e. featherweight.

Arran Brown (cyclist): Arran Brown (born 24 March 1985 in Johannesburg) is a South African professional road cyclist, riding for Team Cycle Fit - RoadCover.  Brown started cycling at the age of 16 and joined his first professional team at the age of 20.  In 2007 he won his first major race, the South African National U/23 Time Trial Championships.  In the same year he also placed third in the South African National U/23 Road Race Championships.  2009 was another major year for Brown as he became South Africa's first "Triple Crown" winner, winning the Cape Argus Cycle Tour, the MTN Amashovashova Classic and the Momentum 94.7 Cycle Challenge.

Andre Thysse: Andre Thysse ( (1968--) 07 1968 (age (2017)-(1968)-((11)<(02)or(11)==(02)and(30)<(07)) ) ) born in Germiston, is a South African professional super middle/light heavyweight boxer of the 1990s and 2000s who won the Gauteng super middleweight Title, South African super middleweight title, and Commonwealth super middleweight title, and was a challenger for the International Boxing Organization (IBO) super middleweight title against Brian Magee, World Boxing Council (WBC) super middleweight title against Markus Beyer, World Boxing Council (WBC) International super middleweight title against Mikkel Kessler, WBC International super middleweight title against Jürgen Brähmer, World Boxing Council (WBC) Continental Americas super middleweight title against Lucian Bute, World Boxing Council (WBC) International light heavyweight title against Adrian Diaconu, and International Boxing Federation (IBF) Australasian super middleweight title against Sakio Bika, his professional fighting weight varied from 163+3/4 lb , i.e. super middleweight to 175 lb , i.e. light heavyweight.

Daniel Ward (boxer): Daniel Ward (born June 3, 1963) is a South African professional light fly/fly/super fly/bantamweight boxer of the 1980s, '90s and 2000s who won the Transvaal flyweight title, South African flyweight title, and Commonwealth flyweight title, and was a challenger for the South African super flyweight title against Nkosana Vaaltein, World Boxing Association (WBA) Inter-Continental flyweight title against Mzukisi Sikali, and World Boxing Union (WBU) flyweight title against Sornpichai Kratingdaenggym, his professional fighting weight varied from 106 lb , i.e. light flyweight to 115+1/4 lb , i.e. bantamweight.  He was trained by Carlos Jacamo.

Supporting paragraphs: Cedric Kushner Corrie Sanders
Answer: Cornelius Johannes