Question: Erling Lorentzen is the widower of a princess born in which year ?
Sentence (from "Princess Ragnhild, Mrs. Lorentzen"): Princess Ragnhild, Mrs. Lorentzen (Ragnhild Alexandra; 9 June 1930 – 16 September 2012) was the eldest child of King Olav V of Norway and Princess Märtha of Sweden.
Relevant evidence: Yes