Question: What is the date of death of Bolesław Of Kuyavia's father?
Sentence (from "Bolesław of Kuyavia"): He was the eldest child( but third- born son) of Mieszko III the Old, Duke of Greater Poland and High Duke of Poland in 1173, by his second wife Eudoxia, daughter of Grand Prince Iziaslav II of Kiev.
Relevant evidence: Yes