Question: What is the country of the border troops of the country of the literature of the country Wilfried Grobner was in?

Knowledge 1: Wilfried Gröbner
Wilfried Gröbner (born 18 December 1949) is a German former footballer and coach who was part of East Germany's gold medal-winning team at the 1976 Olympics. [SEP] Knowledge 2: Literature of East Germany
East German literature is the literature produced in East Germany from the time of the Soviet occupation in 1945 until the end of the communist government in 1990. The literature of this period was heavily influenced by the concepts of socialist realism and controlled by the communist government. As a result, the literature of the German Democratic Republic (East Germany) was for decades dismissed as nothing more than "Boy meet Tractor literature", but its study is now considered a legitimate field. Because of its language, the literature is more accessible to western scholars and is considered to be one of the most reliable, if not the most reliable, sources about East Germany. [SEP] Knowledge 3: Danube
The Danube was once a long-standing frontier of the Roman Empire, and today flows through 10 countries, more than any other river in the world. Originating in Germany, the Danube flows southeast for , passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine before draining into the Black Sea. Its drainage basin extends into nine more countries.
Knowledge 1: Literature of East Germany
East German literature is the literature produced in East Germany from the time of the Soviet occupation in 1945 until the end of the communist government in 1990. The literature of this period was heavily influenced by the concepts of socialist realism and controlled by the communist government. As a result, the literature of the German Democratic Republic (East Germany) was for decades dismissed as nothing more than "Boy meet Tractor literature", but its study is now considered a legitimate field. Because of its language, the literature is more accessible to western scholars and is considered to be one of the most reliable, if not the most reliable, sources about East Germany. [SEP] Knowledge 2: Heinz-Josef Große
Heinz-Josef Große was a 34-year-old East German (GDR) construction worker who was shot and killed on 29 March 1982 by GDR border guards on the Inner German border at Schifflersgrund, near Bad Sooden-Allendorf. [SEP] Knowledge 3: Wilfried Gröbner
Wilfried Gröbner (born 18 December 1949) is a German former footballer and coach who was part of East Germany's gold medal-winning team at the 1976 Olympics.
Knowledge 1: Wilfried Gröbner
Wilfried Gröbner (born 18 December 1949) is a German former footballer and coach who was part of East Germany's gold medal-winning team at the 1976 Olympics. [SEP] Knowledge 2: Literature of East Germany
East German literature is the literature produced in East Germany from the time of the Soviet occupation in 1945 until the end of the communist government in 1990. The literature of this period was heavily influenced by the concepts of socialist realism and controlled by the communist government. As a result, the literature of the German Democratic Republic (East Germany) was for decades dismissed as nothing more than "Boy meet Tractor literature", but its study is now considered a legitimate field. Because of its language, the literature is more accessible to western scholars and is considered to be one of the most reliable, if not the most reliable, sources about East Germany. [SEP] Knowledge 3: Heinz-Josef Große
Heinz-Josef Große was a 34-year-old East German (GDR) construction worker who was shot and killed on 29 March 1982 by GDR border guards on the Inner German border at Schifflersgrund, near Bad Sooden-Allendorf.

Answer: GDR