Question: What is the date of birth of Christina Natt Och Dag's mother?
Sentence (from "Sigrid of Sweden (1566–1633)"): Sigrid Eriksdotter of Sweden (15 October 1566 – 1633) was a Swedish princess, the legitimized daughter of King Eric XIV of Sweden and of his lover, later spouse and queen, Karin Månsdotter.
Relevant evidence: Yes