Question: What is the date of death of Helen Foster Snow's husband?
Sentence (from "Helen Foster Snow"): While living in Beijing, the Snows befriended leftist leaders of the 1935 December 9th Movement, who arranged for first Edgar, then Helen to visit the communist wartime capital, Yan'an, in 1937, where she interviewed Chinese Communist leaders, including Mao Zedong.
Relevant evidence: No