Question: Dieter Zorc is the father of what German retired footballer who played as a central midfielder?

Context paragraphs:
Rico Steinmann: Rico Steinmann (born 26 December 1967 in Karl-Marx-Stadt) is a German retired footballer who played mostly as a midfielder.

Jens Bäumer: Jens Bäumer (born 9 August 1978) is a German retired footballer who played as a midfielder.  who presently serves as an assistant coach for Fredericksburg FC in the National Premier Soccer League.

Markus Aigner: Markus Aigner (born 4 January 1972) is a German retired footballer who played as a midfielder.

Thomas Strunz: Thomas Strunz (born 25 April 1968) is a German retired footballer who played mostly as a defensive midfielder.

Dieter Zorc: Dieter Zorc (born 17 October 1939 – 16 October 2007) was a German football defender.  He was the father of Michael Zorc.

Ervin Bulku: Ervin Bulku (] , born 3 March 1981) is an Albanian retired footballer and current assistant manager of Albania national team.  He was an Utility player and played in many positions such as Central midfielder, Defensive midfielder, Right Midfielder and even Right Defender for the Albania national team in years 2002–2015 and in the club level with Tirana where he started and ended his career after playing for various club outside such as Kryvbas in Ukraine, Hajduk Split in Croatia, AZAL Baku in Azerbaijan and Sepahan in Iran.

Fabian Ernst: Fabian Ernst (born 30 May 1979) is a German retired footballer who played as a midfielder.  He was regarded as a two-way player who can stop the opposition and start attacks with his passing from central midfield.

Christian Wieczorek: Christian Wieczorek (born December 9, 1985 in Bielefeld) is a German retired footballer who played as a Midfielder for FC Vaduz in the Swiss Super League.

Michael Zorc: Michael Zorc (born 25 August 1962) is a German retired footballer who played as a central midfielder.

Jonas Hummels: Jonas Hummels (born 5 August 1990) is a German retired footballer who played as a central defender for SpVgg Unterhaching.  He is the younger brother of German international Mats Hummels, and the son of Hermann Hummels, a former footballer and manager.

Supporting paragraphs: Dieter Zorc Michael Zorc
Answer: Michael Zorc