Question: Which of the people featured in The Memory of Justice  was a German admiral who played a major role in the naval history of World War II?
Sentence (from "Otto von Schrader"): As a U boat commander during World War I he was credited with the sinking of 57 ships for a total of  gross register tons (GRT) , a further 6 ships damaged for a total of  GRT , including  , and one ship taken as prize for a total of  GRT .
Relevant evidence: No