question: Why did Maria Vladimirovna Of Staritsa's father die?
context: [["Vladimir of Staritsa", ["Vladimir Andreyevich (1533 \u2013 9 October 1569) was the last appanage Russian prince.", "His complicated relationship with his cousin, Ivan the Terrible, was dramatized in Sergei Eisenstein's movie \"Ivan the Terrible\".", "The only son of Andrey of Staritsa and Princess Euphrosyne Khovanskaya, Vladimir spent his childhood under strict surveillance in Moscow.", "In 1542, he was reinstated in his father's appanages, Staritsa and Vereya.", "There he married and lived in peace until 1553, when the tsar fell mortally ill.", "During the final crisis of Ivan's illness, most boyars refused to swear fealty to his baby son and decided to put Vladimir on the throne instead.", "To their dismay, the tsar rapidly recovered, but a great change took place in his behaviour and manners.", "He summoned Vladimir to Moscow and signed with him a treaty whereby Vladimir was to live in Moscow with a small retinue and avoid contacts with Ivan's boyars.", "In the event of the tsar's death, Vladimir was to become regent for his minor son.", "After Vladimir's mother was forced to take the veil and his boyars exiled, Ivan permitted Vladimir to marry Princess Eudoxia Romanovna Odoevskaya in April 1555.", "With the start of Oprichnina, however, Ivan's suspicions against his cousin were resuscitated.", "In 1564 the Oprichniks burnt Vladimir's palace in Moscow, and most of his lands were confiscated into Oprichnina.", "In 1569 accused of high treason by Ivan IV, Vladimir and his children were forced to take poison at Ivan's residence of Alexandrov.", "His mother and wife, who resided at the Goritsy Convent near Vologda, were forcibly drowned in the Sheksna River several days later.", "The extermination of Vladimir's family precipitated the extinction of the Rurik Dynasty and the dynastic crisis known as the Time of Troubles.", "Vladimir's only surviving daughter, Maria, was married in 1573 to king Magnus of Livonia (son of Christian III of Denmark).", "Upon her husband's death, she was summoned from Courland to the court of Boris Godunov and forced to take the veil in a convent adjacent to the Troitse-Sergiyeva Lavra.", "In 1609, Maria entered into correspondence with her false cousin who had proclaimed himself tsar.", "Her subsequent fate is not documented."]], ["Richard T. Jones", ["Richard Timothy Jones( born January 16, 1972) is an American actor.", "Jones is best known for his portrayals of Laveinio in the dramatic film\" The Wood\"( 1999) and Mike of the dramatic films\" Why Did I Get Married?\"( 2007) and\" Why Did I Get Married Too?\"( 2010).", "He is also well known for his role as Bruce Van Exel, court services officer on the CBS television series\" Judging Amy\" that aired from 1999 to 2005."]], ["Princess Elizabeth of Greece and Denmark", ["Princess Elisabeth of Greece and Denmark( 24 May 1904 \u2013 11 January 1955) was the middle daughter of Prince Nicholas of Greece and Grand Duchess Elena Vladimirovna of Russia."]], ["Evfrosinia Staritskaia", ["Evfrosinia Staritskaia n\u00e9e Khovanskaia( died 1569), was a Russian noblewoman.", "In 1533, she married Prince Andrey of Staritsa, cousin of Tsar Ivan the Terrible.", "She was described as ambitious and forceful.", "She wished for the Staritski family to influence the regency of Ivan IV, and orchestrated a plot to depose the regent Elena Glinskaya.", "She failed, and was imprisoned with her son Vladimir of Staritsa and her spouse, who died in prison.", "After the death of regent Elena, Evfrosinia returned to court with her son and successfully influenced the Tsar to return the confiscated lands of her spouse.", "In 1550, she arranged for her son to marry Evdokia Nagaja, and allied with the Belskii court faction in order to place her son Vladimir on the throne.", "She created alliances with boyar families by including them in her household in her principality of Staritsa, and equipped the principality with her own army.", "During the illness of Ivan IV in 1553, she actively pressed the claims of her son to the throne.", "However, her plot failed as she did not managed to secure support in the Boyar Duma, nor the full cooperation of her son.", "In response, she herself kept the seal and control of the family principality and refused to give it to her son even as he was no longer a minor.", "When recovered, Ivan IV himself had Vladimir include a promise in his oath not to protect his mother if she was to\" plan harm\" against him again.", "During the Livonian War, Vladmir was honored for his conduct in Battle and won popularity, which made the tsar fear that Evfrosinia would use her son's popularity against him.", "In 1563, Evfrosinia was arrested and put on trial for alleged conspiracy and sentenced to live in a convent.", "She was however allowed to keep her own household in the convent, allowed to make pilgrimage journeys and kept informed of political affairs, and thus the verdict had limited actual effect on her activity.", "In 1569, Ivan IV again suspected Vladimir to be the object of plots to place him on the throne, orchestrated by his mother: he gave orders that she be executed, which was performed."]], ["Grand Duchess Maria Vladimirovna of Russia", ["Grand Duchess Maria Vladimirovna of Russia (born 23 December 1953 in Madrid) has been a claimant to the headship of the Imperial Family of Russia (who reigned as Emperors and Autocrats of All the Russias from 1613 to 1917) since 1992.", "Although she has used Grand Duchess of Russia as her title of pretence with the style Imperial Highness throughout her life, her right to do so is disputed.", "She is a great-great-granddaughter in the male line of Emperor Alexander II of Russia."]], ["Maria Vladimirovna of Staritsa", ["Maria Vladimirovna of Staritsa (ca 1560, Staritsa \u2013 13 May 1610) was a Russian princess.", "She was the daughter of Prince Vladimir of Staritsa and his wife, Princess Eudoxia Romanovna Odoevskaya, and, through her father, descended from Sophia Palaiologina (being her last known descendant).", "On 12 April 1574, in Novgorod, she married Magnus of Livonia.", "They had two children:\nUpon her husband's death, Jerome Horsey escorted Maria from the Bishopric of Courland to the court of Boris Godunov.", "Although Horsey proposed to marry her, Godunov was anxious to get rid of a potential claimant to the throne.", "As a result, Maria was forced to take the veil and entered a convent adjacent to the Troitse-Sergiyeva Lavra.", "In 1609, she entered into correspondence with her false cousin, False Dmitry II, who had proclaimed himself Tsar.", "Her subsequent fate is not documented."]], ["Maria Dolgorukova", ["Maria Vladimirovna Dolgorukova(\" \u041c\u0430\u0440\u0438\u044f \u0412\u043b\u0430\u0434\u0438\u043c\u0438\u0440\u043e\u0432\u043d\u0430 \u0414\u043e\u043b\u0433\u043e\u0440\u0443\u043a\u043e\u0432\u0430\" in Russian)( 1601 \u2013 17 January 1625) was a Tsaritsa of Russia as the first spouse of Tsar Michael I of Russia."]], ["Lamman Rucker", ["Lamman Rucker( born October 6, 1971) is an American actor.", "Rucker began his career on the daytime soap operas\" As the World Turns\" and\" All My Children\", before roles in Tyler Perry's films", "\" Why Did I Get Married?", "Why Did I Get Married Too?\", and\" Meet the Browns\", and its television adaptation.", "In 2016, he began starring as Jacob Greenleaf in the Oprah Winfrey Network drama series,\" Greenleaf\"."]], ["Maria Alyokhina", ["Maria Vladimirovna \"Masha\" Alyokhina (born June 6, 1988) is a Russian political activist.", "She is a member of the anti-Putinist punk rock group Pussy Riot."]], ["Maria Bezobrazova", ["Maria Vladimirovna Bezobrazova (1857-1914) was a Russian philosopher, historiographer, educator, journalist and women's rights activist.", "She was \"the first among Russian women to receive training in philosophy\"."]]]
supporting_facts: [["Maria Vladimirovna of Staritsa", 1], ["Vladimir of Staritsa", 12]]
evidences: [["Maria Vladimirovna of Staritsa", "father", "Vladimir of Staritsa"], ["Vladimir of Staritsa", "cause of death", "poison"]]
answer: poison