Question: What is the date of death of Helena Schilizzi's husband?
Sentence (from "Helena Schilizzi"): Helena Stephanovitch Schilizzi Venizelos (18 September 1873 — 7 September 1959), "née" Helena Stephanovitch Schilizzi ("Elena Skylitsi-Stefanovik"), was a wealthy British philanthropist, and second wife of the Greek statesman Eleftherios Venizelos.
Relevant evidence: Yes