Question: Silke Nowitzki (born July 12, 1974 in Würzburg, West Germany) is a German former international basketball player, she is the manager of her brother, Dirk Werner Nowitzki, a German professional basketball player, for the Dallas Mavericks of which organization?

Context paragraphs:
Silke Nowitzki: Silke Nowitzki (born July 12, 1974 in Würzburg, West Germany) is a German former international basketball player.  She is the manager of her brother Dirk Nowitzki.

Jan Jagla: Jan-Hendrik Jagla (born June 25, 1981) is a former German professional basketball player.  Though he stands 7 feet tall, Jagla has the game of a 2-guard, and his game somewhat resembles that of Dirk Nowitzki.  Jagla was also known to be a point forward in his college days.  He is married to Ivana, a daughter of Svetislav Pešić.

Maxi Kleber: Maximilian "Maxi" Kleber (born January 29, 1992) is a German professional basketball player for the Dallas Mavericks of the National Basketball Association (NBA).  Standing at 2.11 m (6 ft 11 in), he plays at the power forward position.

Dirk Nowitzki: Dirk Werner Nowitzki (] ) (born June 19, 1978) is a German professional basketball player for the Dallas Mavericks of the National Basketball Association (NBA).  An alumnus of Röntgen Gymnasium and the DJK Würzburg basketball club, Nowitzki was chosen as the ninth pick in the 1998 NBA draft by the Milwaukee Bucks and immediately traded to the Mavericks, where he has played since.  Listed at 7 ft , Nowitzki is considered to be one of the greatest power forwards of all time.

Holger Geschwindner: Holger Geschwindner (born September 12, 1945 in Bad Nauheim, Hesse) is a former basketball player, and is the mentor, coach and friend of the National Basketball Association's (NBA) Dallas Mavericks power forward Dirk Nowitzki.  Geschwindner first met Nowitzki when the future basketball star was 16 years old.

Dirk Minniefield: Dirk DeWayne Minniefield (born January 17, 1961) is an American retired professional basketball player.  While at Lafayette High School in Lexington, he was named the 1979 Kentucky "Mr. Basketball", an honor given to the top high school player in the state of Kentucky.  In addition to "Mr. Basketball", he was also named a McDonald's and Parade High School All-American.  Minniefield played his college ball at the University of Kentucky (UK), where he became a member of the 1,000 point club.  In 1983, he was drafted in the second round (33rd overall) by the NBA's Dallas Mavericks.  The 6 ft , 180 lb (82 kg) guard played three seasons in NBA, making stops in Cleveland, Houston, Golden State, and Boston.

Dirk Nowitzki: German Wunderkind: Dirk Nowitzki : German Wunderkind is a biography of the German NBA basketball star Dirk Nowitzki, written by German sports journalists Dino Reisner and Holger Sauer.  It was published in 2004 by the German "Copress" publishing house.  It follows Nowitzki's life as a boy in Würzburg, how he turned to basketball as a teenager, broke through in Germany and eventually became the franchise player of the Dallas Mavericks in the NBA.

Tanguy Ngombo: Tanguy Alban Harrys Ngombo, often incorrectly written as Targuy Ngombo (born July 18, 1989 <nowiki>[</nowiki>disputed<nowiki>]</nowiki>), is a Congolese-born Qatari professional basketball player who plays for Al Rayyan of the Qatari Basketball League.  He has represented the Qatari national team in international competition.  He was drafted by the Dallas Mavericks with the 57th pick in the 2011 NBA Draft.  His draft rights were subsequently traded to the Portland Trail Blazers and then to the Minnesota Timberwolves.  He is the first Qatari national basketball player to be selected in the NBA Draft.

Helga Nowitzki: Helga Nowitzki (née Bredenbröcker) is a German former international basketball player.

Robert Garrett (basketball): Robert Garrett (born 18 March 1977 in Ochsenfurt, Bavaria) is a former German professional basketball player.  From 1996 to 2002 Garrett played with DJK Würzburg where he was a teammate of Dirk Nowitzki.  Before transferring to Bayern Munich he played for the Brose Baskets of the 1st Division.  He is 1.92 m (6 ft 3 ¾ in) in height and he weighs 98 kg (215 pounds).  Garrett was also a member of the German national basketball team.  He competed at the 2008 Olympic Games.

Supporting paragraphs: Silke Nowitzki Dirk Nowitzki
Answer: National Basketball Association