Question: What is the date of death of Prince Christopher Of Greece And Denmark's father?
Sentence (from "Princess Olga of Greece and Denmark"): Princess Olga of Greece and Denmark( Serbian Cyrillic:" Кнегиња Олга Карађорђевић"; 11 June 1903 – 16 October 1997) was a granddaughter of King George I of Greece and wife of Prince Paul, Regent of the Kingdom of Yugoslavia.
Relevant evidence: No