question: What nationality is Wenceslaus I Of Legnica's father?
context: [["Frederick II of Legnica", ["Frederick II, Duke of Legnica( 12 February 1480 \u2013 17 September 1547), also known as the Great of Legnica, was a Duke of Legnica from 1488( until 1495 and 1505 with his brothers), of Brzeg from 1521.", "The most notorious of all Legnica Piast rulers, thanks to his excellent financial politics his Duchy was expanded to the Oder River, and he became the founder of the Duchy of Legnica- Wo\u0142\u00f3w- Brzeg.", "He was the second son of Frederick I, Duke of Chojn\u00f3w- O\u0142awa- Legnica- Brzeg- Lubin, by his wife Ludmila, daughter of George of Pod\u011bbrady, King of Bohemia."]], ["Wenceslaus I of Legnica", ["Wenceslaus I, Duke of Legnica( ca. 1318 \u2013 2 June 1364) was a Duke of Namys\u0142\u00f3w from 1338 and of Legnica- Brieg from 1342 until his death, but with further divisions with his brother Louis I.", "He was the eldest son of Boles\u0142aw III the Generous, Duke of Legnica- Brieg by his first wife, Margaret of Bohemia.", "He was named after his maternal grandfather, King Wenceslaus II of Bohemia."]], ["Henry XI of Legnica", ["Henry XI of Legnica( Schloss Liegnitz, 23 February", "1539 \u2013 Krakow, 3 March 1588), was a thrice Duke of Legnica: 1551- 1556( under regency), 1559 \u2013 1576 and 1580- 1581.", "He was the eldest son of Frederick III, Duke of Legnica, by his wife Katharina, daughter of Henry V, Duke of Mecklenburg- Schwerin."]], ["Boles\u0142aw IV of Legnica", ["Boles\u0142aw IV of Legnica( ca. 1349 \u2013 3/4 March 1394) was a Duke of Legnica since 1364( nominally; together with his brothers).", "He was the third son of Wenceslaus I, Duke of Legnica by his wife Anna, daughter of Casimir I, Duke of Cieszyn."]], ["Rupert I of Legnica", ["Rupert I of Legnica( 27 March 1347 \u2013 by 12 January 1409) was a Duke of Legnica since 1364 until his death, and also regent over half of the Duchy of G\u0142og\u00f3w- \u017baga\u0144 during 1397 \u2013 1401.", "He was the eldest son of Wenceslaus I, Duke of Legnica, by his wife Anna, daughter of Casimir I, Duke of Cieszyn.", "He was born after eight years of childless marriage."]], ["Boles\u0142aw III the Generous", ["Boleslaw III the Wasteful( 23 September 1291 \u2013 Brieg, 21 April 1352), was a Duke of Legnica, Brzeg( Brieg) from 1296 until 1342, and Duke of Wroc\u0142aw from 1296 until 1311.", "He was the eldest son of Henry V the Fat, Duke of Legnica and Wroc\u0142aw, by his wife Elisabeth, daughter of Boles\u0142aw the Pious, Duke of Greater Poland."]], ["Wenceslaus II of Legnica", ["Wenceslaus II, Duke of Legnica( 1348 \u2013 30 December 1419) was a Duke of Legnica from 1364( only nominal; from 1409 he reigned alone and personally) until 1413, Bishop of Lebus( 1375 \u2013 82) and Breslau( Wroclaw)( 1382 \u2013 1417; also Duke of Nysa-Otmuch\u00f3w.", "He was the second son of Wenceslaus I of Legnica, by his wife Anna, daughter of Casimir I, Duke of Cieszyn."]], ["Henry VIII of Legnica", ["Henry VIII of Legnica( ca. 1355 \u2013 12 December 1398) was a Duke of Legnica since 1364( nominally and together with his brothers) and Bishop of W\u0142oc\u0142awek since 1389 until his death.", "He was the fourth of Wenceslaus I, Duke of Legnica, by his wife Anna, daughter of Casimir I, Duke of Cieszyn."]], ["Henry Wenceslaus, Duke of Oels-Bernstadt", ["Henry Wenceslaus, Duke of Oels- Bernstadt( also known as:\" Henry Wenceslaus of Pod\u011bbrady Henry Wenceslaus of Bernstadt\" or\" Henry Wenceslaus of M\u00fcnsterberg\",,, or, or; 7 October 1592, probably in Ole\u015bnica \u2013 21 August 1639, probably in Bernstadt) was Duke of Bernstadt from 1617 until his death.", "He also used the titles of Duke of M\u00fcnsterberg and Count of Glatz, although he never ruled those territories.", "From 1629 to 1639 he was Governor of Silesia."]], ["Frederick III of Legnica", ["Frederick III, Duke of Legnica  (22 February 1520 \u2013 15 December 1570) was a Duke of Legnica during 1547\u20131551 and 1556\u20131559 (both times was deposed by Habsburgs Emperors Charles V and Ferdinand I).", "He was the eldest son of Frederick II, Duke of Legnica-Brzeg, by his second wife Sophie, daughter of Frederick I, Margrave of Brandenburg-Ansbach."]]]
supporting_facts: [["Wenceslaus I of Legnica", 1], ["Boles\u0142aw III the Generous", 1]]
evidences: [["Wenceslaus I, Duke of Legnica", "father", "Boles\u0142aw III the Generous"], ["Boles\u0142aw III the Generous", "country of citizenship", "Poland"]]
answer: Poland