Question: Vladimir Olgerdovich was a son of which ruler of medieval Lithuania?
Sentence (from "Vladimir Olgerdovich"): Vladimir Olgerdovich (Belarusian: Уладзімер Альгердавіч , Lithuanian: "Vladimiras Algirdaitis" , Polish: "Włodzimierz Olgierdowic" , Ukrainian: Володимир Ольгердович ; died after 1398) was a son of Algirdas, Grand Duke of Lithuania, and his first wife Maria of Vitebsk.
Relevant evidence: Yes