question: Who is Otto Bolesławowic's paternal grandfather?
context: [["Boles\u0142aw I the Brave", ["Boles\u0142aw I the Brave( 967 \u2013 17 June 1025), less often known as Boles\u0142aw I the Great, was Duke of Poland from 992 to 1025, and the first King of Poland in 1025.", "As Boleslav IV, he was also Duke of Bohemia between 1002 and 1003.", "He was the son of Mieszko I of Poland by his wife, Dobrawa of Bohemia.", "According to a scholarly theory, Boles\u0142aw ruled Lesser Poland already during the last years of his father's reign.", "Mieszko I, who died in 992, divided Poland among his sons, but Boles\u0142aw expelled his father's last wife, Oda of Haldensleben, and his half- brothers and reunited Poland between 992 and 995.", "He supported the missionary goals of Adalbert, Bishop of Prague, and Bruno of Querfurt.", "The martyrdom of Adalbert in 997 and his imminent canonization were used to consolidate Poland's autonomy from the Holy Roman Empire.", "This perhaps happened most clearly during the Congress of Gniezno( 11 March 1000), which resulted in the establishment of a Polish church structure with a Metropolitan See at Gniezno.", "This See was independent of the German Archbishopric of Magdeburg, which had tried to claim jurisdiction over the Polish church.", "Following the Congress of Gniezno, bishoprics were also established in Krak\u00f3w, Wroc\u0142aw, and Ko\u0142obrzeg, and Boles\u0142aw formally repudiated paying tribute to the Holy Roman Empire.", "Following the death of Holy Roman Emperor Otto III in 1002, Boles\u0142aw fought a series of wars against the Holy Roman Empire and Otto's cousin and heir, Henry II, ending in the Peace of Bautzen( 1018).", "In the summer of 1018, in one of his expeditions, Boles\u0142aw I captured Kiev, where he installed his son -in- law Sviatopolk I as ruler.", "According to legend, Boles\u0142aw chipped his sword when striking Kiev's Golden Gate.", "Later, in honor of this legend, a sword called\" SzczerbiecJagged Sword\") would become the coronation sword of Poland's kings.", "Boles\u0142aw I was a remarkable politician, strategist, and statesman.", "He not only turned Poland into a country comparable to older western monarchies, but he raised it to the front rank of European states.", "Boles\u0142aw conducted successful military campaigns in the west, south and east.", "He consolidated Polish lands and conquered territories outside the borders of modern- day Poland, including Slovakia, Moravia, Red Ruthenia, Meissen, Lusatia, and Bohemia.", "He was a powerful mediator in Central European affairs.", "Finally, as the culmination of his reign, in 1025 he had himself crowned King of Poland.", "He was the first Polish ruler to receive the title of\" rex\"( Latin:\" king\").", "He was an able administrator who established the\" Prince's Law\" and built many forts, churches, monasteries and bridges.", "He introduced the first Polish monetary unit, the\" grzywna\", divided into 240\" denarii\", and minted his own coinage.", "Boles\u0142aw I is widely considered one of Poland's most capable and accomplished Piast rulers."]], ["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."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Guillaume Wittouck", ["Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.", "He was the Grandfather of industrialist Paul Wittouck."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Henry Bryant (naturalist)", ["Henry Bryant( May 12, 1820 \u2013 February 2, 1867) was an American physician and naturalist.", "He was the grandfather of Henry Bryant Bigelow."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["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."]], ["Otto Boles\u0142awowic", ["Otto Boles\u0142awowic( 1000 \u2013 1033) was a Polish prince and member of the House of Piast.", "He was the third son of Boles\u0142aw I the Brave but the second born from his third marriage with Emnilda, daughter of Dobromir, a Slavic prince of Lusatia."]]]
supporting_facts: [["Otto Boles\u0142awowic", 1], ["Boles\u0142aw I the Brave", 2]]
evidences: [["Otto Boles\u0142awowic", "father", "Boles\u0142aw I the Brave"], ["Boles\u0142aw I the Brave", "father", "Mieszko I"]]
answer: Mieszko I