Complex sentence: Ingeborg Eriksdotter of Denmark (ca.1244--24/26 March 1287) was a Danish princess and the Queen consort of Norway from 1263 to 1280, married to King Magnus VI of Norway.
Split into simpler sentences: Ingeborg Eriksdotter of Denmark (ca.1244--24/26 March 1287) was a Danish princess. She was married to King Magnus VI of Norway and was Queen consort of Norway.