Question: In what year did the monarch whose flagship was called Griffen become king of Norway ?
Sentence (from "Gribshunden"): Gribshunden or Griffen (English: "Griffin-Hound" or "Griffin"), also known by several variant names including Gribshund, Gripshunden, Gripshund, Griff, and Griffone, was a Danish warship, the flagship of John, King of Denmark (r. 1481–1513).
Relevant evidence: Yes