Question: When did Henryk Ix Starszy's father die?
Sentence (from "Henry VIII the Sparrow"): (– 14 March 1397) was a Duke of Żagań–Głogów during 1368–1378 (as a co-ruler with his brothers), from 1378 ruler over Zielona Góra, Szprotawa, Kożuchów, Przemków and Sulechów, and since 1395 ruler over half of Głogów, Ścinawa and Bytom Odrzański.
Relevant evidence: Yes