question: Who is Fiachnae Mac Áedo Róin's paternal grandfather?
context: [["\u00c1ed R\u00f3in", ["\u00c1ed R\u00f3in mac B\u00e9cce Bairrche (died 735) was the D\u00e1l Fiatach ruler of the over-kingdom of Ulaid in Ireland.", "He reigned from 708 to 735.", "He was the son of B\u00e9cc Bairrche mac Blathmaic, (died 718), a previous king of Ulaid who had abdicated in 707 to become a pilgrim."]], ["Fa\u00edlbe Flann mac \u00c1edo Duib", ["Fa\u00edlbe Flann mac \u00c1edo Duib( died 639) was a King of Munster from the E\u00f3ganacht Chaisil branch of the Eoganachta.", "He succeeded Cathal mac \u00c1edo Flaind Chathrach of the Glendamnach branch in 628.", "He was the younger brother of a previous king F\u00edngen mac \u00c1edo Duib( d. 618).", "His sobriquet Flann meant\" blood- red\"."]], ["Bressal mac \u00c1edo R\u00f3in", ["Bressal mac \u00c1edo R\u00f3in( died 750) was a D\u00e1l Fiatach ruler of the over- kingdom of Ulaid in Ireland.", "He reigned from 749 to 750.", "He was the son of \u00c1ed R\u00f3in( died 735), a previous king.", "This family had their base in modern- day County Down, Northern Ireland.", "His father had been slain in battle in 735 by the High King of Ireland \u00c1ed All\u00e1n( died 743) of the Cen\u00e9l nE\u00f3gain and the kingship of Ulaid passed to the rival D\u00e1l nAraidi of southern County Antrim.", "However in 749 the D\u00e1l n Araidi king of Ulaid Cathussach mac Ailello was killed at R\u00e1ith Beithech( Rathveagh, modern County Antrim) probably in the interest of the D\u00e1l Fiatach and Bressal became king.", "Bressal himself was killed in 750 but the D\u00e1l Fiatach retained the kingship.", "The king list in the\" Book of Leinster\" places his reign immediately after his father's and state he ruled for one year.", "This is the chronology followed by the later and more synthetic\" Annals of the Four Masters\" which state that he was killed at Dun Celtchair( near Downpatrick).", "The historian Professor Byrne believes that it is probable there was an interregnum in Ulaid between the reigns of \u00c1ed R\u00f3in and Bressal's brother Fiachnae mac \u00c1edo R\u00f3in( died 789)."]], ["Fiachnae mac Demm\u00e1in", ["Fiachnae mac Demm\u00e1in( died 627) was King of Ulaid from 626 to 627.", "Sometimes called Fiachnae Dubtuinne.", "He was a member of the Dal Fiatach and nephew of Baetan mac Cairill( died 581) of Ulaid.", "He was the son of Demm\u00e1n mac Cairell( died 572).", "He succeeded his uncle as king of the Dal Fiatach in 581.", "His first mention in the Irish annals is the battle of C\u00fal Ca\u00edl( possibly Kilkeel, modern County Down) in 601 where he was defeated by Fiachnae mac Baetain of the Dal nAraide.", "The annals mention Fiachnae mac Baetan went against him so was probably the aggressor.", "This was part of the struggle of these two rival clans for the overlordship of Ulaid.", "In 626 was fought the Battle of Leithit Midind at Drung( Knocklayd, modern County Antrim) between these two rivals at which Fiachnae mac Demm\u00e1in was the victor and Fiachnae mac Baetan was slain.", "The annals say the battle was fought by him which implies he was the aggressor.", "He now becomes King of Ulaid but was himself defeated and slain by the King of Dalriada, Connad Cerr at the Battle of Ard Corainn in 627.", "The\" Annals of Clonmacnoise\" claim that this was in revenge for the slaying of Fiachnae mac Baetan.", "His wives were: Cumne Dub, daughter of Furudr\u00e1n mac B\u00e9icce of the U\u00ed Tuirtri.", "She was the mother of D\u00fanchad mac Fiachnai( died circa 644), a king of Ulaid and of a daughter Dub Lacha who married Mong\u00e1n mac Fiachnai( died 625), the son of his rival Fiachnae mac Baetan.", "Cumne( Cumm\u00edne) Find, daughter of B\u00e1et\u00e1n C\u00e1ech of DalnAraide and sister of Fiachnae mac Baetan.", "She was the mother of M\u00e1el Cobo mac Fiachnae( died 647), a king of Ulaid and a son named Suibne.", "He was ancestor of all later Dal Fiatach kings.", "6"]], ["Cairell mac Fiachnai", ["Cairell mac Fiachnai( died 819) was a Dal Fiatach king of Ulaid, which is now Ulster, Ireland.", "He was the son of Fiachnae mac \u00c1edo R\u00f3in( died 789), a previous king.", "He ruled from 810 to 819.", "In 809 Cairell challenged his brother Eochaid mac Fiachnai for the throne and defeated him in battle.", "This challenge had occurred after the high king \u00c1ed Oirdnide campaigned against Ulaid and ravaged from the Bann to Strangford Lough.", "According to the annals Eochaid escaped from the battle and historians assign 810 as his death date.", "Cairell became King of Ulaid as a result.", "In 819 Muiredach mac Eochada( died 839) obtained revenge for his father by defeating and slaying Cairell in a skirmish in 819.", "Viking raids had begun on Ireland( an island off the north Ulaid coast had been attacked in 795) and in 811 the annals record the slaughtering of a group of them by the Ulaid.", "Cairell's descendants did not hold the kingship of Ulaid which instead descended through his brother Eochaid.", "However, his descendants were prominent at the royal monastic center at Downpatrick."]], ["Fiachnae mac \u00c1edo R\u00f3in", ["Fiachnae mac \u00c1edo R\u00f3in (died 789) was a D\u00e1l Fiatach ruler of the over-kingdom of Ulaid in Ireland.", "He reigned from 750 to 789.", "He was the son of \u00c1ed R\u00f3in (died 735) and brother of Bressal mac \u00c1edo R\u00f3in (died 750), previous kings.", "This family had their base in modern-day County Down, Northern Ireland."]], ["Fiachnae mac Ainb\u00edtha", ["Fiachnae mac Ainb\u00edtha( died 886) or Fiachna mac Ainf\u00edtha was a D\u00e1l Fiatach king of Ulaid, which is now Ulster, Ireland.", "He was the son of Ainb\u00edth mac \u00c1edo( died 882), a previous king of Ulaid.", "He ruled briefly in 886.", "In 883 he was responsible for the killing of his uncle Eochoc\u00e1n mac \u00c1edo, leth- r\u00ed( half- king or co-ruler) of Ulaid jointly with his other uncle, Airem\u00f3n mac \u00c1edo( died 886).", "Fiachnae succeeded Airem\u00f3n as sole king in 886 but was promptly killed by his own associates."]], ["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"]], ["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."]], ["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."]]]
supporting_facts: [["Fiachnae mac \u00c1edo R\u00f3in", 2], ["\u00c1ed R\u00f3in", 2]]
evidences: [["Fiachnae mac \u00c1edo R\u00f3in", "father", "\u00c1ed R\u00f3in"], ["\u00c1ed R\u00f3in", "father", "B\u00e9cc Bairrche mac Blathmaic"]]
answer: Bécc Bairrche mac Blathmaic