Question: When did Magnus, Duke Of Östergötland's father die?
Sentence (from "Gustav I of Sweden"): Gustav I, born Gustav Eriksson of the Vasa noble family and later known as Gustav Vasa (12 May 1496 – 29 September 1560), was King of Sweden from 1523 until his death in 1560, previously self-recognised Protector of the Realm ("Riksföreståndare") from 1521, during the ongoing Swedish War of Liberation against King Christian II of Denmark, Norway and Sweden.
Relevant evidence: Yes