Question: Princess Astrid, Mrs. Ferner is the older sister of a king who ascended to the throne on which day ?
Sentence (from "Princess Astrid, Mrs. Ferner"): Princess Astrid, Mrs. Ferner (Astrid Maud Ingeborg; born 12 February 1932 in Oslo, Norway) is the second daughter of King Olav V of Norway and his wife, Princess Märtha of Sweden.
Relevant evidence: No