Question: What year did the father of Princess Ragnhild, Mrs. Lorentzen become King?
Sentence (from "Lorentzen family"): Among its members are shipowner Erik Finn Lorentzen and industrialist Erling Lorentzen, who was married to Princess Ragnhild of Norway (known as Princess Ragnhild, Mrs. Lorentzen after her marriage), the eldest daughter of King Olav V of Norway.
Relevant evidence: Yes