question: Who is Birger Brosa's paternal grandmother?
context: [["Mona Hopton Bell", ["Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.", "She was the grandmother of the painter Jean H. Bell."]], ["G\u00fclbahar Hatun (wife of Mehmed II)", ["G\u00fclbahar Hatun( 1432 \u2013 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I."]], ["Hannah Arnold", ["Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children."]], ["Bengt Snivil", ["Bengt Snivil (also known as \"Bengt Snivel\") from the House of Bjelbo was a Swedish magnate in mid-12th century.", "Some more or less romantic later literature has given him the title of jarl, although no proper historical source attests to such.", "Romantic genealogies assign a lady Sigrid Lakman as his wife, though without historical source.", "Arguably, Bengt Snivil was that Bengt or Benedict, who was son of", "riksjarl Folke the Fat and Ingegerd Knutsdotter of Denmark, daughter of king Canute IV of Denmark."]], ["Anne Denman", ["Anne Denman( 1587\u20131661) was born in Olde Hall, Retford, Nottinghamshire.", "Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne."]], ["Kaoru Hatoyama", ["After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama."]], ["Folke Filbyter", ["Folke Filbyter is the popularized name of the pagan progenitor of the House of Bjelbo clan.", "Since Folke is said to have been the great- great- grandfather of Birger Brosa, he would have lived in the 11th century.", "His cognomen\" Filbyter\" is believed to mean\" foal biter\" and refers to a man who castrates colts with his teeth."]], ["Hubba bint Hulail", ["Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic\" Nab\u012b\"( Prophet) Muhammad ibn Abdullah."]], ["Tjuyu", ["Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.", "She is the grandmother of Akhenaten, and great grandmother of Tutankhamun."]], ["Birger Brosa", ["Birger Brosa (Old Norse: \"Birgir Br\u00f3sa\" where \"Br\u00f3sa\" means \"smiling\"), jarl of Sweden 1174\u20131202, d. 9 January 1202 on Visings\u00f6, was a son of Bengt Snivil and a member of the powerful House of Bj\u00e4lbo.", "In the medieval texts he is either called the \"jarl of the Swedes\" or the \"jarl of the Swedes and the Geats\".", "Birger was appointed to the position of jarl during the reign of Knut Eriksson.", "He maintained the position during Knut's successor Sverker II until his death in 1202.", "Before 1170, Birger was married to Brigida Haraldsdotter, the daughter of the Norwegian king Harald Gille.", "She had formerly been married to the Danish pretender Magnus Henriksson, who had briefly ruled in Uppsala 1160\u20131161.", "Birger appears to have maintained peace in Sweden during the civil wars that ravaged Denmark and Norway.", "Many of the pretenders in these kingdoms sought refuge with Birger.", "Among them were the Birkebeiner chieftains Eystein Meyla and Sverre Sigurdsson who were kinsmen of Brigida Haraldsdotter.", "Birger's son Philippus was in the service of King Sverre and died as his Earl in 1200.", "Birger owned estates in \u00d6sterg\u00f6tland, N\u00e4rke, V\u00e4rmland and S\u00f6dermanland.", "He was a great donor to the convent of Riseberga in N\u00e4rke, where Birgitta spent her last years after Birger's death.", "As soon as he was dead, a civil war broke out."]]]
supporting_facts: [["Birger Brosa", 0], ["Bengt Snivil", 4]]
evidences: [["Birger Brosa", "father", "Bengt Snivil"], ["Bengt Snivil", "mother", "Ingegerd Knutsdotter of Denmark"]]
answer: Ingegerd Knutsdotter of Denmark