Question: When did Sevasti Xanthou's husband die?
Sentence (from "Sevasti Xanthou"): Sevasti Xanthou ("Sevasti Kroustala-Xanthou") (1798–?) was the wife of Emmanuil Xanthos, member and one of the founders of Filiki Eteria ("Society of Friends"), a Greek conspiratorial organization against the Ottoman Empire.
Relevant evidence: Yes