question: Who is Bjørn Haraldsen Ironside's stepmother?
context: [["Bj\u00f8rn Haraldsen Ironside", ["Bj\u00f8rn Haraldsen Ironside (\"Bj\u00f8rn J\u00e6rnside\") (died 1134) was a Danish prince.", "Bj\u00f8rn was one of the 15 sons of Prince Harald Kesja.", "Bj\u00f8rn married Princess Katarina Ingesdotter of Sweden, the daughter of King Inge I of Sweden.", "Bj\u00f8rn was the father of Christina Bjornsdatter, a Swedish queen.", "Bj\u00f8rn accidentally drowned with his brother Eric in 1134 near Schleswig."]], ["Irene Baker", ["Edith Irene Bailey Baker( November 17, 1901 \u2013 April 2, 1994) was an American politician and a United States Representative from Tennessee.", "She was the widow of Howard Baker Sr. and the stepmother of Howard Baker Jr."]], ["Catherine Ingesdotter of Sweden", ["Catherine of Sweden( Swedish:\" Katarina Ingesdotter\") was a medieval Swedish princess who married the Danish prince Bj\u00f8rn Haraldsen Ironside."]], ["Peju Ogunmola", ["Peju Ogunmola is a Yoruba film actress who stars in Nollywood movies of Yoruba genres.", "Her father was the veteran actor Kola Ogunmola.", "She is the wife of Sunday Omobolanle, a 64- year- old Nigerian comic actor, playwright, film director, and producer.", "She is the stepmother of Sunkanmi Omobolanle who is also an actor."]], ["May Green Hinckley", ["May Green Hinckley( May 1, 1881 \u2013 May 2, 1943) was the third general president of the Primary of The Church of Jesus Christ of Latter- day Saints( LDS Church) from 1940 until her death.", "She was the stepmother of Gordon B. Hinckley, fifteenth president of the LDS Church."]], ["Henriette Feuerbach", ["Henriette Feuerbach( 13 August 1812 \u2013 5 August 1892) was a German author and arts patron.", "She was the wife of Joseph Anselm Feuerbach and the stepmother of painter Anselm Feuerbach, whom she supported in his art."]], ["Jane Wigham", ["Jane Wigham( n\u00e9e Smeal; 1801\u20131888) was a leading Scottish abolitionist.", "She was the stepmother of Eliza Wigham and the second wife of John Wigham."]], ["Verona Barnes", ["Verona Barnes( born December 29, 1946) is an American actress who appeared in multiple New York City theater plays.", "She is the stepmother of actress Rachel True.", "Her roles include Mrs. Harris and the Street Person in\" All God's Chillun Got Wings,\" as well as Jack's friend in\" The Great White Hope\"."]], ["Dorothy Granger", ["Dorothy Karolyn Granger( November 21, 1911 \u2013 January 4, 1995) was an American actress best known for her roles in short subject comedies in Hollywood.", "She was also the stepmother of film maker and former record producer Anthony J. Hilder."]], ["Harald Kesja", ["Harald Kesja, \"Harald the Spear\", (1080\u20131135) was the son of Eric", "I of Denmark and anti-king of Denmark.", "He acted as regent 1103-1104 for his father while he was on pilgrimage to Jerusalem alongside Archbishop Asser of Lund.", "As regent, he was courageous, but violent, cruel and debauched.", "Harald plundered far and wide from his stronghold Haraldsborg at Roskilde, which greatly contributed to him not being elected king after his father died in 1103.", "Instead, his uncle Niels of Denmark was elected king in 1104.", "In 1132, he allied with his half-brother Eric Emune in order to avenge his third brother Canute Lavard, but he later turned to the murderer", "Magnus I of Sweden because he had desires for the Danish throne himself.", "He tried to gain recognition as king by the name of Harald IV and was successful in receiving the homage of Jutland, but he was defeated along with Magnus Nilsson at the Battle of Fotevik in Sk\u00e5ne, 1134.", "He fled after the defeat but he was taken captive near Vejle on Jutland and decapitated together with eight of his sons.", "Harald Kesja had married to Ragnild Magnusdotter, the daughter of King Magnus III of Norway.", "They had four or six sons:\nHarald Kesja had also further nine illegitimate sons of whom we know the names of six of them:"]]]
supporting_facts: [["Bj\u00f8rn Haraldsen Ironside", 1], ["Harald Kesja", 10]]
evidences: [["Bj\u00f8rn Haraldsen Ironside", "father", "Harald Kesja"], ["Harald Kesja", "spouse", "Ragnild Magnusdotter"]]
answer: Ragnild Magnusdotter