Question: The Pianist is a memoir in which the author survives with the help of which German Army officer?
Sentence (from "Wilm Hosenfeld"): 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).
Relevant evidence: Yes