Question: What is the date of death of Rudolf Of Żagań's father?
Sentence (from "Rudolf of Żagań"): Rudolf of Żagań  (ca. 1418 – 18 September 1454) was a Duke of Żagań-Przewóz since 1439 (with his brothers as co-rulers until 1449), from 1449 Duke of Żagań (as co-ruler of his older brother).
Relevant evidence: No