question: What is the date of death of Anna Of Mecklenburg's mother?
context: Title: Anna of Brandenburg, Duchess of Mecklenburg
  Passage: Anna of Brandenburg (1 January 1507 – June 19, 1567 in Lübz) was a Duchess consort of Mecklenburg.
  Title: Anna of Mecklenburg
  Passage: Anna of Mecklenburg (14 October 15334 July 1602), was a Duchess consort of Courland by marriage to the Duke of Courland, Gotthard Kettler. She was the daughter of Albrecht VII, Duke of Mecklenburg and Anna of Brandenburg. Anna is the first woman in Livonia whose life story is entirely historically confirmed.
answer: June 19, 1567
citations: Anna of Mecklenburg Anna of Brandenburg, Duchess of Mecklenburg