Question: Vladmir Filatov was able to save the eyesight of sniper Vasily Zaytsev during what battle?
Sentence (from "Vasily Zaytsev"): Vasily Grigoryevich Zaytsev; 23 March 1915 – 15 December 1991) was a Soviet sniper and a Hero of the Soviet Union during World War II.
Relevant evidence: No