Question: What is the cause of death of Chava Rosenfarb's husband?
Sentence (from "Chava Rosenfarb"): Chava Rosenfarb (9 February 1923 – 30 January 2011)  was a Holocaust survivor and Jewish-Canadian author of Yiddish poetry and novels, a major contributor to post-World War II Yiddish Literature.
Relevant evidence: No