Question: Who is the son of Princess Märtha of Sweden and King Olav V?
Sentence (from "Princess Märtha of Sweden"): Princess Märtha of Sweden (Märtha Sofia Lovisa Dagmar Thyra; 28 March 1901 – 5 April 1954) was Crown Princess of Norway as the spouse of the future King Olav V from 1929 until her death in 1954.
Relevant evidence: Yes