Question: What is the date of death of Alexander Jagiellon's father?
Sentence (from "Casimir IV Jagiellon"): Casimir IV KG (in full Casimir IV Andrew Jagiellon; ; Lithuanian: ; 30 November 1427 – 7 June 1492) was Grand Duke of Lithuania from 1440 and King of Poland from 1447, until his death.
Relevant evidence: Yes