question: Who is Cammán Mac Amlaíb's paternal grandfather?
context: [["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Kaya Alp", ["Kaya Alp was, according to Ottoman tradition, the son of K\u0131z\u0131l Bu\u011fa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertu\u011frul, and the great grandfather of the Ottoman Empire founder, Osman I."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Camm\u00e1n mac Amla\u00edb", ["Camm\u00e1n mac Amla\u00edb was a Norse-Gaelic viking who is recorded in the Irish annals as being defeated in 960.", "He has been identified as being a son of Amla\u00edb mac Gofraid (d.941), as well as possibly being Sitriuc Cam, who was defeated in battle by Amla\u00edb Cuar\u00e1n two years later."]], ["Henry Krause", ["Henry J.\" Red\" Krause, Jr.( August 28, 1913 \u2013 February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.", "He played college football at St. Louis University.", "He is the grandfather of Jennifer Krause", "He is the great grandfather of Payton Hoeing"]], ["Fred Le Deux", ["Frederick\" Fred\" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).", "He is the grandfather of Tom Hawkins."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["John Mackay (poet)", ["John Mackay( 1656\u20131754), known as( The Blind Piper), was a Scottish Gaelic poet and composer, and the grandfather of William Ross."]], ["Zhao Shoushan", ["Zhao Shoushan( 12 November 1894 \u2013 20 June 1965) was a KMT general and later Chinese Communist Party politician.", "He is the grandfather of Zhao Leji."]], ["Olaf Guthfrithson", ["Olaf Guthfrithson (died 941) was a Viking leader who ruled Dublin and Viking Northumbria in the 10th century.", "He was the son of Gofraid ua \u00cdmair and great-grandson of \u00cdmar, making him one of the U\u00ed \u00cdmair.", "Olaf succeeded his father as King of Dublin in 934 and succeeded in establishing dominance over the Vikings of Limerick when he captured their king, Amla\u00edb Cenncairech, in 937.", "That same year he allied with Constantine II of Scotland in an attempt to reclaim the Kingdom of Northumbria which his father had ruled briefly in 927.", "The forces of Olaf and Constantine were defeated by the English led by \u00c6thelstan at the Battle of Brunanburh in 937.", "Olaf returned to Ireland in 938 but after \u00c6thelstan's death the following year Olaf left for York where he was quickly able to establish himself as king, with his brother Bl\u00e1caire mac Gofraid being left to rule in Dublin.", "Olaf and \u00c6thelstan's successor Edmund met in 939 at Leicester where they came to an agreement regarding the division of England between them.", "This agreement proved short-lived, however, and within a few years Vikings had occupied the Five Boroughs of Derby, Leicester, Lincoln, Nottingham and Stamford.", "Olaf died in 941 and was succeeded in Northumbria by his cousin Olaf Cuaran.", "At the time of his death, the Irish annals title him \"king of Danes\" and \"king of the Fair Foreigners and the Dark Foreigners\"."]]]
supporting_facts: [["Camm\u00e1n mac Amla\u00edb", 1], ["Olaf Guthfrithson", 1]]
evidences: [["Camm\u00e1n mac Amla\u00edb", "father", "Amla\u00edb mac Gofraid"], ["Olaf Guthfrithson", "father", "Gofraid ua \u00cdmair"]]
answer: Gofraid ua Ímair