Question: Fregattenkapitän Heinrich Lehmann-Willenbrock was a submarine commander in Germany during World War II and the subject of the mini-series called "Das Boot" when he was portrayed by which actor? 
Sentence (from "Heinrich Lehmann-Willenbrock"): He was sixth among the top ten successful U-boat commanders during the Battle of the Atlantic against the Allies, in terms of tonnage of merchant ships sunk.
Relevant evidence: No