question: Who is the paternal grandfather of Ollom Fotla?
context: [["Fujiwara no Nagara", [", also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.", "He was the grandfather of Emperor Y\u014dzei."]], ["Prithvipati Shah", ["Prithvipati Shah( ?\u20131716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.", "He was the grandfather of Nara Bhupal Shah."]], ["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."]], ["F\u00ednnachta", ["F\u00ednnachta, son of Ollom Fotla, was, according to medieval Irish legend and historical tradition, a High King of Ireland in succession to his father.", "His given name was Elim.", "There is said to have been snow of wine( Old Irish\" f\u00ednwinesnechtasnow\") in his reign, from which he gained his better- known name.", "He ruled for twenty years before dying of plague at Mag Inis in Ulster, and was succeeded by his brother Sl\u00e1noll.", "The chronology of Geoffrey Keating's\" Foras Feasa ar \u00c9irinn\" dates his reign to 913\u2013895 BC, that of the\" Annals of the Four Masters\" to 1278 \u2013 1258 BC."]], ["Ollom Fotla", ["Ollom Fotla (\"the scholar of F\u00f3dla\", a poetic term for Ireland; later spelled Ollamh Fodhla), son of F\u00edachu F\u00ednscothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland.", "His given name was Eochaid.", "He took power after killing his predecessor, Faildergd\u00f3it, whose father, Muinem\u00f3n, had killed his father.", "He ruled for forty years, and died of natural causes at Tara, succeeded by an unbroken sequence of six descendants, beginning with his son F\u00ednnachta, followed by two more sons, Sl\u00e1noll and G\u00e9de Ollgothach.", "He is said to have instituted the \"Feis Temrach\" or Assembly of Tara.", "Keating describes the \"Feis Temrach\" as an assembly like a parliament, at which the nobles, scholars and military commanders of Ireland gathered on Samhain every three years to pass and renew laws and approve annals and records.", "The Assembly was preceded and followed by three days of feasting.", "He also built a structure at Tara called the \"M\u00far nOlloman\" or Scholar's Rampart.", "It has been identified without any convincing reason that the Passage Tomb of Ollamh Fodhla is Cairn T in Loughcrew.", "There's also a large stone with neolithic carvings on it at the site, known as Hags chair or the seat of Ollamh Fodhla.", "It is believed Cairn T was also where the great 'Law-giver king', first promulgated his legal code."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Guillaume Wittouck", ["Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.", "He was the Grandfather of industrialist Paul Wittouck."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["F\u00edachu F\u00ednscothach", ["F\u00edacha F\u00ednscothach, son of S\u00e9tna Airt, was, according to medieval Irish legend and historical tradition, a High King of Ireland.", "His father became High King after killing the previous incumbent, Rothechtaid mac Main, in single combat at Cruachan in defence of F\u00edachu.", "F\u00edachu went into exile, but returned at the head of a \"black fleet\", and, with the assistance of Muinem\u00f3n, killed his father and took the throne himself. \"", "Flowers of wine\" (Old Irish: \"f\u00ednwinescothflower-ach\", possessive suffix, although \"scoth\" can also mean \"blade\" and \"voice\"), which were pressed into glass vats, were said to exist during his reign.", "He ruled for twenty years, until he was killed by his former accomplice, Muinem\u00f3n.", "The chronology of Geoffrey Keating's \"Foras Feasa ar \u00c9irinn\" dates his reign to 975\u2013955 BC, that of the \"Annals of the Four Masters\" to 1353\u20131333 BC."]]]
supporting_facts: [["Ollom Fotla", 0], ["F\u00edachu F\u00ednscothach", 0]]
evidences: [["Ollom Fotla", "father", "F\u00edachu F\u00ednscothach"], ["F\u00edachu F\u00ednscothach", "father", "S\u00e9tna Airt"]]
answer: Sétna Airt