Question: Which Soviet sniper and a Hero of the Soviet Union during World War II became the source material for a character from "Enemy at the Gates?"
Sentence (from "Enemy at the Gates"): Enemy at the Gates is a 2001 French-American war film written and directed by Jean-Jacques Annaud and based on William Craig's 1973 nonfiction book "", which describes the events surrounding the Battle of Stalingrad in the winter of 1942 and 1943.
Relevant evidence: No