question: Who is the paternal grandfather of Mieszko Bolesławowic?
context: [["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Guillaume Wittouck", ["Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.", "He was the Grandfather of industrialist Paul Wittouck."]], ["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."]], ["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."]], ["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."]], ["Mieszko Boles\u0142awowic", ["Mieszko Boles\u0142awowic (c. 1069\u20131089) was the only son of Boles\u0142aw II the Generous, King of Poland.", "Mieszko was Prince of Cracow from 1086 until his death in 1089."]], ["Boles\u0142aw II the Generous", ["Boles\u0142aw II the Generous, also known as the Bold and the Cruel (\"\u015amia\u0142yOkrutny\";", "c. 1042 \u2013 2 or 3 April 1081 or 1082), was Duke of Poland from 1058 to 1076 and third King of Poland from 1076 to 1079.", "He was the eldest son of", "Duke Casimir I the Restorer and Maria Dobroniega of Kiev.", "Boles\u0142aw II is considered to have been one of the most capable of the Piast rulers.", "In 1075 he re-established the Archdiocese of Gniezno (consecrated in 1064) and founded the Diocese of P\u0142ock.", "He established Benedictine monasteries in Mogilno, Lubin and Wroc\u0142aw.", "Boles\u0142aw II was also the first Polish monarch to produce his own coinage in quantity great enough to replace the foreign coins prevalent in the country during the reigns of the first Piast kings.", "He established royal mints in Krak\u00f3w and Wroc\u0142aw and reformed the coinage, which brought considerable revenue into the royal coffers.", "All these efforts had an enormous influence on the economic and cultural development of the country.", "According to the chronicler Gallus Anonymus, during his reign he was called \"largusthe Generous\" in English, \"Szczodry\" in Polish) as he founded many churches and monasteries throughout Poland.", "The nickname \"the Bold\u015amia\u0142y\") was only given to Boles\u0142aw II for the first time in the later \"Chronicle of the Polish kings\", although it was considered by historiography of the 19th and 20th centuries as a contemporary nickname."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["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."]]]
supporting_facts: [["Mieszko Boles\u0142awowic", 0], ["Boles\u0142aw II the Generous", 3]]
evidences: [["Mieszko Boles\u0142awowic", "father", "Boles\u0142aw II the Generous"], ["Boles\u0142aw II the Generous", "father", "Casimir I the Restorer"]]
answer: Casimir I the Restorer