question: Who is the paternal grandfather of Bolesław Ii Of Niemodlin?
context: [["Wenceslaus of P\u0142ock", ["Wenceslaus( Wa\u0144ko) of P\u0142ock( Masovian dialect:\" Wa\u0144ko Puocky\"; 1293/97 \u2013 23 May 1336), was a Polish prince member of the House of Piast, Duke of P\u0142ock since 1313 and vassal of Bohemia from 1329.", "He was the third son of Boles\u0142aw II of P\u0142ock but the only born from his second marriage with Kunigunde, daughter of King Ottakar II of Bohemia.", "He was probably named after his maternal uncle, King Wenceslaus II of Bohemia."]], ["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 of Niemodlin", ["Boles\u0142aw II of Niemodlin (1326/35 \u2013 by 25 June 1368), was a Duke of Niemodlin since 1365 until his death (with his brothers as co-rulers).", "He was the eldest son of Boles\u0142aw the Elder, Duke of Niemodlin, by his wife Euphemia, daughter of Henry VI", "the Good, Duke of Wroc\u0142aw."]], ["Nicholas II of Niemodlin", ["Nicholas II of Niemodlin( \u2013 27 June 1497), was a Duke of Opole- Brzeg- Strzelce- Niemodlin in 1476( as co-ruler of his father) and sole Duke of Niemodlin from 1476 until his death.", "He was the third son of Duke Nicholas I of Opole by his wife Agnes, daughter of Duke Louis II of Brzeg."]], ["Boles\u0142aw II Rogatka", ["Boles\u0142aw II Rogatka or Boles\u0142aw II the Horned, known also as Boles\u0142aw II the Bald,( c. 1220/5 \u2013 26/31 December 1278), a member of the Silesian Piasts, was High Duke of Poland briefly in 1241 and Duke of Silesia at Wroc\u0142aw from 1241 until 1248, when the duchy was divided between him and his brothers.", "After the partition, he ruled the Silesian Duchy of Legnica until his death.", "The second Mongol raid against Poland, led by Nogai Khan, occurred during his reign."]], ["Boles\u0142aw the Elder", ["Boles\u0142aw the Elder , was a Silesian Duke.", "He was the ruling Duke of Wielu\u0144 during 1313\u20131326, Duke of Niemodlin from 1313 and ruler over Prudnik from 1336 until his death.", "He was the eldest son of Duke Bolko I of Opole by his wife Agnes, probably a daughter of Margrave Otto III of Brandenburg.", "Boles\u0142aw was nicknamed \"the Elder\" or \"First-bornPierworodny\") in order to distinguish him from his younger brother, who, for unknown reasons, was also named Boles\u0142aw (Bolko)."]], ["Wenceslaus of Niemodlin", ["Wenceslaus of Niemodlin( 1336/46 \u2013 June 1369) was a Duke of Niemodlin since 1365 until his death( with his brothers as co-rulers), and Duke of Gliwice from 1364.", "He was the second son of Boles\u0142aw the Elder, Duke of Niemodlin, by his wife Euphemia, daughter of Henry VI the Good, Duke of Wroc\u0142aw."]], ["Trojden I, Duke of Masovia", ["Trojden I( 1284/86 \u2013 13 March 1341), was a Polish prince member of the House of Piast, Duke of Czersk since 1310, ruler over Warsaw and Liw since 1313, regent of P\u0142ock during 1336 \u2013 1340.", "He was the second son of Boles\u0142aw II of P\u0142ock and his first wife Gaudemant\u0117( Sophia), the daughter of Grand Duke Traidenis of Lithuania.", "He was named after his maternal grandfather."]], ["Henry of Niemodlin", ["Henry of Niemodlin( after 1345 \u2013 14 September 1382), was a Duke of Niemodlin since 1365 until his death( with his brothers as co-rulers until 1369).", "He was the third and youngest son of Boles\u0142aw the Elder, Duke of Niemodlin, by his wife Euphemia, daughter of Henry VI the Good, Duke of Wroc\u0142aw."]], ["Boles\u0142aw II of Masovia", ["Boles\u0142aw II of Masovia or Boles\u0142aw II of P\u0142ock( pl:\" Boles\u0142aw II mazowiecki( p\u0142ocki)\"; ca. 1253/58 \u2013 20 April 1313), was a Polish prince member of the House of Piast, Duke of Masovia during 1262- 1275 jointly with his brother, since 1275 sole ruler over P\u0142ock, since 1294 ruler over all Masovia and Duke of Krak\u00f3w and Sandomierz during 1288- 1289.", "In 1310 he gave to his sons the districts of Warsaw and Czersk."]]]
supporting_facts: [["Boles\u0142aw II of Niemodlin", 1], ["Boles\u0142aw the Elder", 2]]
evidences: [["Boles\u0142aw II of Niemodlin", "father", "Boles\u0142aw the Elder"], ["Boles\u0142aw the Elder", "father", "Bolko I of Opole"]]
answer: Bolko I of Opole