Question: What is the date of death of Prince Gustaf, Duke Of Uppland's mother?
Sentence (from "Josephine of Leuchtenberg"): Joséphine of Leuchtenberg or Joséphine de Beauharnais (Joséphine Maximilienne Eugénie Napoléone de Beauharnais; 14 March 1807 – 7 June 1876) was Queen of Sweden and Norway as the wife of King Oscar
Relevant evidence: Yes