an Entity references as follows:
Olav V (Norwegian pronunciation: [ˈûːlɑːv dɛn ˈfɛ̂mtə]; born Prince Alexander of Denmark; 2 July 1903 – 17 January 1991) was the King of Norway from 1957 until his death in 1991. Olav was the only child of King Haakon VII of Norway and Maud of Wales. He became heir apparent to the Norwegian throne when his father was elected King of Norway in 1905. He was the first heir to the Norwegian throne to be brought up in Norway since Olav IV in the fourteenth century, and his parents made sure he was given as Norwegian an upbringing as possible. In preparation for his future role, he attended both civilian and military schools. In 1929, he married his first cousin Princess Märtha of Sweden. During World War II his leadership was much appreciated and he was appointed Norwegian Chief of Defence in 1