Question: What technical director of FC St. Pauli was seriously injured in a foul in 1981?

Context paragraphs:
Norbert Siegmann: Norbert Siegmann (born 20 May 1953) is a retired German football player.  He spent 11 seasons in the Bundesliga with VfB Stuttgart, Tennis Borussia Berlin and SV Werder Bremen.  As of February 2009, he is managing the low-level amateur club SV Weser 08 Bremen.  He is probably best known for seriously injuring Ewald Lienen in 1981.  That foul was called "the most well-known foul in the history of Bundesliga".

Ewald Lienen: Ewald Lienen (born 28 November 1953) is a German former football player and current technical director of FC St. Pauli.

FC St. Pauli Rugby: The FC St. Pauli Rugby is a German rugby union from Hamburg, currently playing in the Rugby-Bundesliga.  The team is part of the multi-sport club FC St. Pauli, which also offers other sports like Association football, American football and Baseball.

Timo Schultz: Timo Schultz (born 26 August 1977 in Wittmund) is a former German footballer, now coach, currently assistant coach of German club FC St. Pauli.  He made his professional debut in the 2.  Bundesliga for FC St. Pauli on 10 August 2007 when he started in a game against 1.  FC Köln.

St. Pauli Piers: The St. Pauli Piers (German: "St. Pauli Landungsbrücken" , often only referred to as "Landungsbrücken"; ] ), are the largest landing place in the Port of Hamburg, Germany, and also one of Hamburg's major tourist attractions.  Other English language translations include St. Pauli Landing Stages or St. Pauli Landing Bridges.

2017–18 FC St. Pauli season: The 2017–18 FC St. Pauli season is the 107th season in the football club's history and 7th consecutive season in the second division of German football, the 2.  Bundesliga and 25th overall.  In addition to the domestic league, FC St. Pauli also are participating in this season's edition of the domestic cup, the DFB-Pokal.  This is the 55th season for FC St. Pauli in the Millerntor-Stadion, located in St. Pauli, Hamburg, Germany.  The season covers a period from 1 July 2017 to 30 June 2018.

Millerntor-Stadion: Millerntor-Stadion is a multi-purpose stadium in Hamburg St. Pauli, Germany.  It is mainly used for football matches and is the home stadium of FC St. Pauli.  It is on the "Heiligengeistfeld", near the Reeperbahn, the red light district of Hamburg.  The stadium had a capacity of 32,000 when it was built in 1961.  Sometimes it is used for the American football team of the Hamburg Blue Devils and, although very rarely, for concerts or festivals such as a show by Prince on 31 August 1988, the "Retter festival" 2003 or the "Jubiläumsfestival 100 Jahre FC St.Pauli" in 2010.

Fabian Boll: Fabian "Boller" Boll (born 16 June 1979) is a German football midfielder who plays for FC St. Pauli II as a playing assistant coach, a club from Hamburg, Germany.  As a police officer he was the only one on his St. Pauli team who had a non-football job.  He inherited his number 17 from Ivan Klasnić who left St. Pauli for Werder Bremen.

Jan-Philipp Kalla: Jan-Philipp Kalla (born 6 August 1986) is a German footballer playing for FC St. Pauli.  He made his debut on the professional league level in the 2.  Bundesliga for FC St. Pauli on 6 May 2008 when he started in a game against 1.  FC Kaiserslautern.

Borussia Mönchengladbach 12–0 Borussia Dortmund: On 29 April 1978, the final match day of the 1977–78 Fußball-Bundesliga season, Borussia Mönchengladbach played Borussia Dortmund with the possibility of winning the Bundesliga championship.  Knowing that if 1.  FC Köln won their game away to FC St. Pauli, Borussia Mönchengladbach would have to win by a margin well in excess of ten goals.  The match finished 12–0, which remains the largest margin of victory and biggest win in Bundesliga history.  However, 1.  FC Köln beat FC St. Pauli 5–0 to become champions.

Supporting paragraphs: Norbert Siegmann Ewald Lienen
Answer: Ewald Lienen