Question: What is the date of death of Uliana Olshanska's husband?
Sentence (from "Vytautas"): Vytautas (c. 1350 – October 27, 1430), also known as Vytautas the Great (Lithuanian: , , "Witold Aleksander" or "Witold Wielki" Ruthenian: "Vitovt",
Relevant evidence: Yes