Question: What is the date of death of Botho Sigwart Zu Eulenburg's father?
Sentence (from "Philipp, Prince of Eulenburg"): Philipp Friedrich Alexander, Prince of Eulenburg and Hertefeld, Count of Sandels (12 February 1847 – 17 September 1921) was a diplomat and composer of Imperial Germany who achieved considerable influence as the closest friend of Wilhelm II.
Relevant evidence: Yes