question: Who is the paternal grandfather of Władysław I Of Płock?
context: [["Siemowit IV, Duke of Masovia", ["Siemowit IV (Ziemowit IV), also known as Siemowit IV the Younger", "(pl: \"", "Siemowit IV M\u0142odszy\"; ca. 1353/1356 \u2013 21 January 1426)", ", was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, P\u0142ock, Sochaczew, Gostynin, P\u0142o\u0144sk and Wizna, since 1386 hereditary Polish vassal, since 1388 ruler over Belz, during 1382\u20131401 he lost Wizna and during 1384\u20131399 and 1407\u20131411 he lost Zawkrze, during 1384\u20131399 he lost P\u0142o\u0144sk, taken by the Teutonic Order.", "He was the second son of Siemowit III, Duke of Masovia and his first wife Euphemia, daughter of Nicholas II of Opava.", "Already during his father's lifetime, Siemowit IV received his own district, Rawa Mazowiecka (ca. 1373/74), and as a result of the partition of Masovia between him and his older brother", "Janusz", "I after the death of their father on 16 June 1381, Siemowit IV finally obtain the totality of his domains:", "Rawa, P\u0142ock, Sochaczew, Gostynin, P\u0142o\u0144sk and Wizna."]], ["Siemowit I of Masovia", ["Siemowit I of Masovia( c. 1224/28 \u2013 23 June 1262), was a Polish prince member of the House of Piast, Duke of Czersk during 1247- 1248, Duke of Masovia( except Dobrzy \u0144) during 1248- 1262, ruler over Sieradz during 1259- 1260.", "He was the sixth son of Konrad I of Masovia and his wife Agafia of Rus.", "He was named after his older brother Siemowit, who died young in 1224."]], ["W\u0142adys\u0142aw I of P\u0142ock", ["W\u0142adys\u0142aw I of P\u0142ock (pl: \"", "W\u0142adys\u0142aw I p\u0142ocki\"; 1406/09 - 11/12 December 1455), was a Polish prince member of the House of Piast from the Masovian branch.", "He was a Duke of P\u0142ock, Rawa Mazowiecka, Gostynin, Sochaczew, Belz, P\u0142o\u0144sk, Zawkrze and Wizna during 1426-1434 jointly with his brothers, after the division of the paternal inheritance between him and his brothers in 1434, sole ruler over P\u0142ock, P\u0142o\u0144sk, Wizna and Zawkrze; in 1442 he reunited all their patrimony (except Gostynin).", "He was the fifth son of Siemowit IV, Duke of Masovia and Alexandra of Lithuania, daughter of Algirdas."]], ["Gaudemunda of Lithuania", ["Gaudemunda Sophia of Lithuania( also Gaudimant\u0117; c. 1260 \u2013 1288/1313) was the daughter of Traidenis, Grand Duke of Lithuania( c. 1270 \u2013 1282).", "In 1279 she married Duke of Masovia Boles\u0142aw II( c. 1254\u20131313) of the Piast dynasty.", "He was the son of Ziemowit I, Prince of Masovia, and Pereyaslava, daughter of Daniel of Galicia of the Rurik dynasty.", "Her husband united the Duchy of Masovia and then divided it between their sons, who were:"]], ["Sophia of Masovia", ["Sophia of Masovia( 1497/1498- before 11 March 1543) was a Princess of Masovia, daughter of Konrad III Rudy, Duke of Masovia and his wife Anna Radziwi\u0142\u0142.", "She was a member of the House of Piast.", "On 17 September 1520 in Warsaw, Sophia was married by proxy to Stephen VII B\u00e1thory.", "On 17 January 1521, Sophia and her entourage went to Hungary, where in February there was a formal marriage.", "The couple had three children:", "Anna, Stephen and Klara; however, other sources claim that Klara was the couple's only child.", "Klara was engaged to Carl, Duke of M\u00fcnsterberg, but died in 1535, before the marriage took place.", "After the death of Stephen in 1530, Sophia was married to Croatian magnate Louis Pekry.", "Sophia's second marriage was childless.", "She then died sometime before 11 March 1543.", "Sophia had three siblings: Stanislaus I of Masovia, Janusz III of Masovia and Anna of Masovia, both her brothers died childless and so Anna and Sophia were the last Masovian Piasts.", "Soon after Janusz's death, the Duchy of Masovia was annexed into the kingdom of Poland, despite resistance from some of the Masovian nobility.", "They tried to retain their independence and argued that the Duchy should be inherited by the female relatives( such as Anna or Sophia).", "The Polish king refused to recognize their demands.", "Anna was made titular Duchess of Masovia."]], ["Ladislaus of Salzburg", ["W\u0142adys\u0142aw of Salzburg, also known as W\u0142adys\u0142aw of Wroc\u0142aw or W\u0142adys\u0142aw of Silesia( \u2013 27 April 1270), a member of the Silesian Piasts, was co-ruler in the Duchy of Wroclaw since 1248.", "He served as chancellor of King Ottokar II of Bohemia from 1255 and was elected Bishop of Bamberg in 1257 and Bishop of Passau in 1265.", "W\u0142adys\u0142aw became Prince- Archbishop of Salzburg in the same year, and from 1268 also served as administrator of the Wroc\u0142aw diocese."]], ["Siemowit III, Duke of Masovia", ["Siemowit III of Masovia( his name also rendered Ziemowit; \u2013 1381) was a prince of Masovia and a co-regent( with his brother Casimir I of Warsaw) of the lands of Warsaw, Czersk, Rawa, Gostynin and other parts of Masovia."]], ["Anna of Masovia", ["Anna of Masovia( c. 1498 \u2013 after 26 January 1557 in Jaroslaw) was Princess of Mazovia and a member of the House of Piast.", "She was the last representative of the line of Masovian- Piast.", "She was the second daughter of Konrad III of Masovia and Anna Radziwi\u0142\u0142.", "She was a sister of Dukes Janusz III of Masovia and Stanislaus of Masovia, and Sophia, who married Stephen VII B\u00e1thory."]], ["Jan I the Scholastic", ["Jan I the Scholastic( 1308 /10 \u2013 1372 before 29 September), was a Duke of O\u015bwi\u0119cim from 1324 until his death.", "He was the eldest child and only son of Duke W\u0142adys\u0142aw of O\u015bwi\u0119cim by his wife Euphrosyne, daughter of Duke Boleslaus II of Masovia."]], ["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."]]]
supporting_facts: [["W\u0142adys\u0142aw I of P\u0142ock", 3], ["Siemowit IV, Duke of Masovia", 4]]
evidences: [["W\u0142adys\u0142aw I of P\u0142ock", "father", "Siemowit IV"], ["Siemowit IV", "father", "Siemowit III, Duke of Masovia"]]
answer: Siemowit III, Duke of Masovia