Question: In what year did Sigismund Casimir's mother die?

full_context: Document 1: Sigismund Kęstutaitis: Sigismund Kęstutaitis (Lithuanian: "Žygimantas I Kęstutaitis" ; Polish: "Zygmunt Kiejstutowicz" ; c. 1365 – 20 March 1440) was the Grand Duke of Lithuania from 1432 to 1440. Sigismund was his baptismal name; Sigismund's pagan Lithuanian birth name is unknown. He was the son of the Grand Duke of Lithuania Kęstutis and his wife Birutė.
Document 2: Anna Jagiellon: Anna Jagiellon (Polish: "Anna Jagiellonka" , Lithuanian: "Ona Jogailaitė" ; 18 October 1523 – 12 November 1596) was Queen of Poland and Grand Duchess of Lithuania in her own right from 1575 to 1586. She was a daughter of Polish King Sigismund I the Old and his Italian wife Bona Sforza. Despite multiple proposals, she remained unmarried until the age of 52. After the death of King Sigismund II Augustus, her brother and the last male member of the Jagiellon dynasty, Anna's hand was sought by pretenders to the Polish–Lithuanian throne to maintain the dynastic tradition. She was elected, along with her then-fiancé Stephen Báthory, as co-ruler in the 1576 royal election of the Polish–Lithuanian Commonwealth. Their marriage was a formal arrangement and distant. Báthory was preoccupied with the Livonian War, while Anna spent her time in Warsaw on local administrative matters and several construction works. After Báthory's death in December 1586, she had an opportunity to claim the throne for herself (she was co-ruler and not merely a consort), but did not even attempt it. Instead, she promoted her nephew Sigismund III Vasa, establishing House of Vasa on the Polish–Lithuanian throne for the next eighty years (1587–1668).
Document 3: Cecilia Renata of Austria: Archduchess Cecilia Renata of Austria (German: "Cäcilia Renata"; Polish: "Cecylia Renata"; 16 July 1611 – 24 March 1644) was Queen of Poland as consort to the Polish-Lithuanian Commonwealth's King Władysław IV Vasa.
Document 4: Barbara Zápolya: Barbara Zápolya (1495–1515) was Queen of Poland and Grand Duchess of Lithuania as the first wife of King Sigismund I the Old. Marriage to Barbara represented an alliance between Sigismund and the House of Zápolya against the Habsburgs in succession disputes over the throne to the Kingdom of Hungary. The alliance was short-lived as the renewed Muscovite–Lithuanian War forced Sigismund to look for Habsburg allies. The marriage was loving, but short. Barbara was the mother of Hedwig, Electress of Bradenburg, but died soon after the birth of her second daughter Anna.
Document 5: John II Casimir Vasa: John II Casimir (Polish: "Jan II Kazimierz Waza" ; German: "Johann II. Kasimir Wasa" ; Lithuanian: "Jonas Kazimieras Vaza" ; 22 March 1609 – 16 December 1672) was King of Poland and Grand Duke of Lithuania during the era of the Polish–Lithuanian Commonwealth, Duke of Opole in Upper Silesia, and titular King of Sweden 1648–1660. In Poland, he is known and commonly referred as Jan Kazimierz. His parents were Sigismund III Vasa (1566–1632) and Constance of Austria (1588–1631). His older brother, and predecessor on the throne, was Władysław IV Vasa.
Document 6: Saint Casimir: Saint Casimir Jagiellon (Polish: "Kazimierz" , Lithuanian: "Kazimieras" ; October 3, 1458 – March 4, 1484) was a prince of the Kingdom of Poland and of the Grand Duchy of Lithuania. Second oldest son of King Casimir IV, he was tutored by Johannes Longinus, a Polish chronicler and diplomat. After his elder brother Vladislaus was elected as King of Bohemia in 1471, Casimir became the heir apparent. At the age of 13, Casimir participated in the failed military campaign to install him as King of Hungary. He became known for his piousness, devotion to God, and generosity towards the sick and poor. He became ill (most likely with tuberculosis) and died at the age of 25. He was buried in Vilnius Cathedral and his cult grew. His canonization was initiated by his brother King Sigismund I the Old in 1514 and the tradition holds that he was canonized in 1521.
Document 7: Constance of Austria: Constance of Austria (German: "Konstanza" ; Polish: "Konstancja" ; 24 December 1588 – 10 July 1631) was queen of Poland as the second wife of King Sigismund III Vasa and the mother of King John II Casimir.
Document 8: Elizabeth of Austria (1436–1505): Elizabeth of Austria (German: "Elisabeth" , Polish: "Elżbieta Rakuszanka" ; Lithuanian: "Elžbieta Habsburgaitė" ; c. 1436 – 30 August 1505) was the wife of King Casimir IV of Poland and thus Queen of Poland and Grand Duchess of Lithuania. Orphaned at an early age, she spent her childhood in the court of Holy Roman Emperor Frederick III. As one of the three surviving grandchildren of Emperor Sigismund, she had a strong claim to the kingdoms of Hungary and Bohemia. That made her an attractive bride for a Polish prince. The Polish nobility, seeking to increase Polish influence in Hungary and Bohemia, pursued marriage with Elizabeth since she was born and finally succeeded in 1454. Her marriage to Casimir was one of the most exemplary royal marriages in Poland. She gave birth to thirteen children, eleven of whom survived to adulthood. Four of her sons were crowned as kings.
Document 9: Sigismund Casimir: Sigismund Casimir, Crown Prince of Poland (Polish: "Zygmunt Kazimierz Waza" ), (1 April 1640 – 9 August 1647) - was the only legitimate son of King Władysław IV and his first wife Queen Cecilia Renata. He was named after his grandfather Sigismund III, and uncle John Casimir.
Document 10: Władysław IV Vasa: Władysław IV Vasa (Polish: "Władysław IV Waza" ; Russian: Владислав IV Ваза , "Vladislav IV Vaza" ; Latin: "Vladislaus IV Vasa" or "Ladislaus IV Vasa"; Lithuanian: "Vladislovas Vaza" ; 9 June 1595 – 20 May 1648) was a Polish prince from the Royal House of Vasa. He reigned as King of Poland and Grand Duke of Lithuania from 8 November 1632 to his death in 1648.
Document 11: Elizabeth Stuart, Queen of Bohemia: Elizabeth Stuart (19 August 1596 – 13 February 1662) was Electress of the Palatinate and briefly Queen of Bohemia as the wife of Frederick V of the Palatinate. Due to her husband’s reign in Bohemia lasting for just one winter, Elizabeth is often referred to as The Winter Queen.
Document 12: Archduchess Catherine Renata of Austria: Archduchess Catherine Renata of Austria (4 January 1576 – 29 June 1599) was a member of the House of Habsburg.
Document 13: Barbara Radziwiłł: Barbara Radziwiłł (Polish: "Barbara Radziwiłłówna" , Lithuanian: "Barbora Radvilaitė" ; 6 December 1520/23 – 8 May 1551) was Queen of Poland and Grand Duchess of Lithuania as consort of Sigismund II Augustus, the last male monarch of the Jagiellon dynasty. Barbara, a great beauty and already widowed, became a royal mistress most likely in 1543 and they married in secret in July or August 1547. The marriage caused a scandal; it was vehemently opposed by Polish nobles, including Queen mother Bona Sforza. Sigismund Augustus, assisted by Barbara's cousin Mikołaj "the Black" Radziwiłł and brother Mikołaj "the Red" Radziwiłł, worked tirelessly to gain recognition of their marriage and to crown Barbara as Queen of Poland. They succeeded and Barbara's coronation was held on 7 December 1550 at Wawel Cathedral. However, her health was already failing and she died just five months later. Even though it was brief, her reign propelled the Radziwiłł family to new heights of political power and influence.
Document 14: Sigismund III Vasa: Sigismund III Vasa (also known as "Sigismund III of Poland", Polish: "Zygmunt III Waza" , Swedish: "Sigismund" , Lithuanian: "Žygimantas Vaza" , English exonym: "Sigmund"; 20 June 1566 – 30 April 1632
Document 15: Casimir IV Jagiellon: Casimir IV KG (Polish: "Kazimierz IV Andrzej Jagiellończyk" ; Lithuanian: "Kazimieras Jogailaitis" ; 30 November 1427 – 7 June 1492 ) of the Jagiellonian dynasty was Grand Duke of Lithuania from 1440 and King of Poland from 1447, until his death. He was one of the most active Polish rulers, under whom Poland, by defeating the Teutonic Knights in the Thirteen Years' War recovered Pomerania, and the Jagiellonian dynasty became one of the leading royal houses in Europe. He was a strong opponent of aristocracy, and helped to strengthen the importance of Parliament and the Senate.
ground_truth: 1644