Question: What is the date of death of Henry Of Sandomierz's father?
Sentence (from "Bolesław III Wrymouth"): Bolesław III Wrymouth( also known as Boleslaus III the Wry-mouthed)( 20 August 1086 – 28 October 1138), was a Duke of Lesser Poland, Silesia and Sandomierz between 1102 and 1107 and over the whole Poland between 1107 and 1138.
Relevant evidence: Yes