question: Who is Anna Maria Of Brandenburg-Ansbach's maternal grandmother?
context: [["Anna of W\u00fcrttemberg", ["Anna of W\u00fcrttemberg( 12 June 1561 in Stuttgart \u2013 7 July 1616 in Chojn\u00f3w), was a German princess, member of the House of W\u00fcrttemberg, and by her two marriages Duchess of O\u0142awa- Wo\u0142\u00f3w and Legnica.", "She was the daughter of Christoph, Duke of W\u00fcrttemberg, by his wife Anna Maria of Brandenburg- Ansbach, daughter of George, Margrave of Brandenburg- Ansbach."]], ["Sabina of Brandenburg-Ansbach", ["Sabina of Brandenburg-Ansbach (12 May 1529 \u2013 2 November 1575) was a princess of Brandenburg-Ansbach and Electress of Brandenburg by marriage."]], ["Sophie of Brandenburg-Ansbach-Kulmbach", ["Sophie of Brandenburg- Ansbach- Kulmbach( 10 March 1485, Ansbach \u2013 24 May 1537, Liegnitz( Legnica)) was a princess of Brandenburg- Ansbach and was by marriage Duchess of Legnica."]], ["Sophie of Brandenburg-Ansbach", ["Sophie of Brandenburg- Ansbach( 23 March 1535, Ansbach \u2013 22 February 1587, Legnica) was a princess of Brandenburg- Ansbach and by marriage Duchess of Legnica."]], ["Princess Eleonore Juliane of Brandenburg-Ansbach", ["Eleonore Juliane of Brandenburg- Ansbach( 23 October 1663 \u2013 4 March 1724) was a princess of Brandenburg- Ansbach and through her marriage duchess of W\u00fcrttemberg- Winnental."]], ["Dorothy Catherine of Brandenburg-Ansbach", ["Dorothy Catherine of Brandenburg- Ansbach( 23 February 1538, Ansbach \u2013 18 January 1604, Tou\u017eim) was a princess of Brandenburg- Ansbach and by marriage burgravine of Meissen."]], ["Anna Maria of Brandenburg-Ansbach", ["Anna Maria of Brandenburg-Ansbach (28 December 1526 \u2013 20 May 1589) was a German princess of Brandenburg-Ansbach.", "Anna Maria was born at J\u00e4gerndorf, the eldest daughter of George, Margrave of Brandenburg-Ansbach and his second wife Hedwig of M\u00fcnsterberg-Oels, daughter of Charles I of M\u00fcnsterberg-Oels.", "Anna Maria was brought up as a Lutheran and on 24 February 1544 became the wife of Christoph, Duke of W\u00fcrttemberg.", "She later acted as guardian to her son Ludwig III, Duke of W\u00fcrttemberg early in his reign.", "After the death of her husband Christoph she lived more than 20 years in the N\u00fcrtingen castle, she died in N\u00fcrtingen.", "After losing both her husband and her eldest son in 1568, Anna Maria fell madly in love with the young Landgrave George I of Hesse-Darmstadt (1547\u20131596).", "Soon afterwards she became mentally confused and was locked up.", "George I later married her daughter Eleonore.", "She died in 1589 and was buried in the St. George's Collegiate Church in T\u00fcbingen."]], ["Margravine Sophie of Brandenburg-Ansbach (1614\u20131646)", ["Sophie of Brandenburg- Ansbach( 1614\u20131646) was a German noblewoman of the house of Brandenburg- Ansbach."]], ["Hedwig of M\u00fcnsterberg-Oels", ["Hedwig of Munsterberg-Oels (10/12 June 1508, Ole\u015bnica \u2013 28 November 1531, Legnica) was born Duchess of M\u00fcnsterberg and Ole\u015bnica and Countess of Kladsko and by marriage Margravine of Brandenburg-Ansbach-Kulmbach.", "Hedwig was a daughter of Duke Charles I of M\u00fcnsterberg-Oels, who was a grandson of the King George of Bohemia.", "Her mother was Anna of Sagan, a daughter of John II, the last Duke of \u017baga\u0144 (Sagan).", "On 9 January 1525 Hedwig married Margrave George of Brandenburg-Ansbach-Kulmbach.", "She was George's second wife.", "The marriage produced two daughters:", "Hedwig died in Legnica (Liegnitz), where she was buried."]], ["George, Margrave of Brandenburg-Ansbach", ["George of Brandenburg- Ansbach( 4 March 1484 \u2013 27 December 1543), known as George the Pious, was a Margrave of Brandenburg- Ansbach from the House of Hohenzollern."]]]
supporting_facts: [["Anna Maria of Brandenburg-Ansbach", 1], ["Hedwig of M\u00fcnsterberg-Oels", 2]]
evidences: [["Anna Maria of Brandenburg-Ansbach", "mother", "Hedwig of M\u00fcnsterberg-Oels"], ["Hedwig of M\u00fcnsterberg-Oels", "mother", "Anna of Sagan"]]
answer: Anna of Sagan