Question: The Russian ironclad Ne Tron Menia sunk in what event that was also known as the Leningrad Blockade that started on September 8th, 1941?
Sentence (from "55th Army (Soviet Union)"): Using the defenses of the Slutsk-Kolpino Fortified Area, the army defended Leningrad's southern approaches in the area of Kolpino, Krasnogvardeysk, Zaborje, Vyritsa, the Izhora River and the Tosna River.
Relevant evidence: No