Question: What is the date of death of George Of Bytom's father?
Sentence (from "Casimir of Bytom"): Casimir of Bytom  (1253/57 – 10 March 1312) was a Duke of Opole during 1282–1284 (with his brother as co-ruler) and Duke of Bytom from 1284 until his death.
Relevant evidence: Yes