Question: The main character of The Pianist survives due to the help of a German army captain, who was taken prisoner by what army?
Related documents: [0]  [DOC] Wilhelm Adalbert Hosenfeld (] ; 2 May 1895 – 13 August 1952), originally a school teacher, was a German Army officer who by the end of the Second World War had risen to the rank of "Hauptmann" (Captain). He helped to hide or rescue several Polish people, including Jews, in Nazi-occupied Poland, and helped Polish-Jewish pianist and composer Władysław Szpilman to survive, hidden, in the ruins of Warsaw during the last months of 1944, an act which was portrayed in the 2002 film The Pianist. He was taken prisoner by the Red Army and died in Soviet captivity seven years later. [END] 
[1]  [DOC] The Pianist is a memoir by the Polish-Jewish pianist and composer Władysław Szpilman in which he describes his life in Warsaw in occupied Poland during World War II. After being forced with his family to live in the Warsaw ghetto, Szpilman manages to avoid deportation to the Treblinka extermination camp, and from his hiding places around the city witnesses the Warsaw ghetto uprising in 1943 and the Warsaw uprising (the rebellion by the Polish resistance) the following year. He survives in the ruined city with the help of friends and strangers, including Wilm Hosenfeld, a German army captain who admires his piano playing. [END] 
Answer: 
Red Army
Red Army