Question: What is the date of death of Holmger Knutsson's mother?
Sentence (from "Helena Pedersdatter Strange"): Helena Pedersdotter Strange (Danish: "Helene"; in Sweden also called Queen Elin) (ca. 1200–1255) was a Swedish Queen Consort, spouse of King Canute II of Sweden and of a Danish noble family later called Ulfeldt.
Relevant evidence: Yes