{"input": "What is the date of birth of Magnus I, Duke Of Mecklenburg's mother?", "context": "Passage 1:\nJohn VI, Duke of Mecklenburg\nJohn VI, Duke of Mecklenburg (1439\u20131474) was a Duke of Mecklenburg.\n\nLife\nJohn was the second son of Henry IV, Duke of Mecklenburg, and his wife Dorothea, daughter of Elector Frederick I of Brandenburg.\nHis earliest documented official act (jointly with the father) was in 1451.  In 1464 he ruled an apanage of several districts jointly with his brother Albert VI, but did not participate actively in administering them.\nIn 1472, John VI was engaged to Sophie, the daughter of Duke Eric II of Pomerania.  The marriage was set to be celebrated in 1474.  However, John VI died before the marriage took place.  The exact date of his death is unknown; he is last mentioned in a document dated 20 May 1474.\nHis last illness was contracted on a journey to Franconia to visit his uncle Elector Albrecht III Achilles of Brandenburg.  In Kulmbach, he was infected with the plague and died.  He was probably buried in Poor Clares monastery in Hof.\n\nExternal links\nGenealogical table of the House of Mecklenburg\nPassage 2:\nEric II, Duke of Mecklenburg\nEric II, Duke of Mecklenburg (German: Erich II., Herzog zu Mecklenburg; 3 September 1483 \u2013 21/22 December 1508) was Duke of Mecklenburg, a son of Magnus II, Duke of Mecklenburg, and his wife Sophie of Pomerania-Stettin.\nEric ruled Mecklenburg-Schwerin jointly with his brothers Henry V and Albert VII and his uncle Balthasar after his father's death on 27 December 1503.  Eric himself probably died on 21 December or 22 December 1508. He was buried in the Doberan Minster in Bad Doberan. He never married and died childless.\nPassage 3:\nJohn I, Duke of Mecklenburg-Stargard\nJohn I, Duke of Mecklenburg-Stargard (1326 \u2013 9 August 1392 or 9 February 1393), Duke of Mecklenburg from 1344 to 1352 and Duke of Mecklenburg-Stargard from 1352 to 1392.\n\nFamily\nHe was probably the youngest child from the second marriage of Lord Henry II \"the Lion\" of Mecklenburg and Anna of Saxe-Wittenberg, a daughter of Duke Albert II of Saxe-Wittenberg.\n\nLife\nJohn I was probably born in 1326.  His father died in 1329, and he remained under guardianship until 1344, when he came of age and began to carry a seal as a participant in the governance of Mecklenburg.  On 8 July 1348, Holy Roman Emperor Charles IV raised John and his brother Albert II to the rank of Duke in Prague.  John, Albert and Charles initially supported the False Waldemar, but in 1350 they reconciled with his supporter Duke Louis V of Bavaria.\nUpon the division of Mecklenburg on 25 November 1352, John was awarded the Lordships of Stargard, Sternbuerg and Ture.  He supported his nephew Albert III of Mecklenburg in his attempts to be recognized as King of Sweden.\n\nMarriages and issue\nJohn married three times. His first wife Rixa (background unknown) probably died soon after the wedding and the marriage remained childless.\nHis second wife Anna was a daughter of the count Adolf VII of Pinneberg and Schauenburg.  She probably died in 1358.  John and Anna had a daughter Anna, who married Wartislaw VI of Pomerania-Wolgast on 4 April 1363.\nJohn's third wife Agnes was the daughter of Ulrich II of Lindow-Ruppin and widow of Lord Nicholas IV of Werle.  They probably married in 1358 and had five children together:\n\nJohn II (died between 6 July and 9 October 1416), co-regent, then Duke of Mecklenburg-Stargard, from 1408 Lord of Sternberg, Friedland, F\u00fcrstenberg and Lychen\nUlrich I (died 8 April 1417), co-regent, then Duke of Mecklenburg-Stargard (1392\u20131417), from 1408 Lord of Neubrandenburg, Stargard, Strelitz and Wesenberg (with Lize)\nRudolf (died after 28 July 1415), was initially Bishop of Skara and from 1390 as Rudolf III Bishop of Schwerin\nAlbert I (died 1397), co-regent of Mecklenburg, from 1396 Coadjutor of Dorpat\nContance (born c. 1373, died 1408)\n\nExternal links\nGenealogical table of the House of Mecklenburg\nPassage 4:\nEilika of Saxony\nEilika of Saxony (c.\u20091080 \u2013 16 January 1142) was a daughter of Magnus, Duke of Saxony and a member of the Billung dynasty. Through marriage to Otto of Ballenstedt, she was countess of Ballenstedt.\n\nLife\nEilika was the younger daughter of Magnus, Duke of Saxony and Sophia, daughter of King B\u00e9la I of Hungary. Since Eilika had no brothers, after her father's death in 1106, Eilika and her sister, Wulfhilde of Saxony, inherited his property. Eilika received property in Bernburg, Wei\u00dfenfels, Werben and perhaps also in Burgwerden and Kreichau, as well as the Palatinate of Saxony.In 1130 Eilika was in conflict with the citizens of the city of Halle, probably because of her support for Archbishop Norbert of Magdeburg. Fighting broke out, during which Conrad of Eichstadt was killed, and from which Eilika only escaped with difficulty.  \nAround 1131 Eilika wrested the advocacy of the monastery of Goseck (monastery) from Louis of Thuringia, and took it for herself. In 1133 Eilika expelled Abbot Bertold from Goseck for incompetency. In 1134 she introduced his successor, Abbot Penther, to the abbey with a solemn address to the monks. \nIn 1138 Eilika was accused of tyranny (tyrannis), and attacked at her castle of Bernburg.\n\nMarriage and children\nEilika married Count Otto of Ballenstedt before 1095. With Otto, Eilika had two children: Albert the Bear and Adelaide of Ballenstedt, who married Henry II, Margrave of the Nordmark.\nPassage 5:\nHenry IV, Duke of Mecklenburg\nHenry IV, Duke of Mecklenburg (1417 \u2013 9 March 1477) was from 1422 to 1477 Duke of Mecklenburg.\n\nLife\nHenry IV of Mecklenburg, because of his obesity and lavish lifestyle also called the \"Henry the Fat\", was the son of the Duke John IV of Mecklenburg and Catherine of Saxe-Lauenburg.\nHe inherited Mecklenburg when his father died in 1422.  His mother, Catherine, and his uncle, Albert V, acted as Regents until 1436.  He then ruled jointly with his brother John V, until his brothers death in 1442.  In May 1432, he married Dorothea of Brandenburg, the daughter of Elector Frederick I of Brandenburg.\nWith the death of Prince William of Werle in 1436, the male line of the Werle branch of the House of Mecklenburg died out, and Werle fell to the Duchy of Mecklenburg.  After Duke Ulrich II of Mecklenburg-Stargard died in 1471, Mecklenburg was again united under one ruler.\nThe Stettin War of Succession between the Pomeranian Dukes and the Brandenburg Electors ended in late May 1472 through Henry's mediation.\nAt the end of his life, he gradually transferred his power to his sons Albert, John and Magnus.  After Henry's death they ruled jointly, until John died in 1474 and Albert in 1483.  After Albert's death, Magnus ruled alone.  His younger brother Balthasar cared little about the business of government.\nHenry died in 1477 and was buried in the Doberan Abbey.\n\nIssue\nAlbert VI (\u2020 1483), Duke of Mecklenburg\nJohn VI (\u2020 1474), Duke of Mecklenburg\nMagnus II, Duke of Mecklenburg\nBalthasar Duke of Mecklenburg, coadjutor of the diocese of Schwerin until 1479.\n\nExternal links\nGenealogical table of the House of Mecklenburg\nPassage 6:\nJohn III, Duke of Mecklenburg-Stargard\nJohn III, Duke of Mecklenburg-Stargard (1389 \u2013 after 11 November 1438) was from 1416 to 1438 Duke of Mecklenburg, Lord of Stargard, Sternberg, Friedland, F\u00fcrstenberg, and Lychen.  To distinguish him from John V, Duke of Mecklenburg, he is sometimes called John the Elder.\n\nFamily\nHe was the oldest child of Duke John II and his wife Catherine (Wilheida) of Lithuania.\n\nLife\nJohn III was probably born in 1389.  In 1416, he took over the reign of Sternberg from his father.  He was taken prisoner by Brandenburg, for unknown reasons.  He was released on 28 June 1427, under the condition that he had to swear an oath of allegiance to the Margrave of Brandenburg.\nIn 1436, he and his cousin Henry and his remote cousin Henry IV of Mecklenburg-Schwerin, jointly inherited the Lordship of Werle.\nHe married Luttrud, the daughter of Albert IV of Anhalt-K\u00f6then.  She was probably a sister of Anna, the first wife of William of Werle, the last Lord of Werle.  The marriage remained childless.\nJohn III died in 1438 and was probably buried in Sternberg.  His cousin Henry of Mecklenburg-Stargard inherited his possessions.\nPassage 7:\nMagnus I, Duke of Mecklenburg\nMagnus I, Duke of Mecklenburg (1345 \u2013 1 September 1384) was Duke of Mecklenburg from 1383 until his death.  Magnus was the third son of Duke Albert II of Mecklenburg and his wife Euphemia of Sweden, the sister of the King Magnus IV of Sweden.  Sometime after 1362, he married Elizabeth of Pomerania-Wolgast, daughter of Barnim IV, Duke of Pomerania.\nMagnus had two children:\n\nJohn IV, Regent of Mecklenburg from 1384 to 1395 and co-regent from 1395 to 1422\nEuphemia (d. 16 October 1417);married on 18 October 1397 with Lord Balthasar of WerleAfter the death of his brother Henry III in 1383, he ruled Mecklenburg jointly with Henry's son Albert IV until his own death in 1384.\n\nExternal links\nGenealogical table of the House of Mecklenburg\nPassage 8:\nEuphemia of Sweden\nEuphemia of Sweden (Swedish: Eufemia Eriksdotter; 1317 \u2013 16 June 1370) was a Swedish princess. She was Duchess consort of Mecklenburg, heiress of Sweden and of Norway, and mother of King Albert of Sweden. \n(c. 1338-1412) .\n\nBiography\nEarly life\nEuphemia was born in 1317 to Eric Magnusson (b. c. 1282-1318), Duke of S\u00f6dermanland, second son of King Magnus I of Sweden, and Princess Ingeborg of Norway (1300\u20131360), the heiress and the only legitimate daughter of King Haakon V of Norway (1270\u2013 1319).In 1319, her infant elder brother Magnus VII of Norway (1316\u20131374) succeeded their maternal grandfather to the throne of Norway. That same year, Swedish nobles exiled their uncle, King Birger of Sweden, after which the infant Magnus was elected King of Sweden. Their mother Ingeborg had a seat in the guardian government as well as the position of an independent ruler of her own fiefs, and played an important part during their childhood and adolescence.The 24 July 1321 marriage contract for Euphemia was signed at Bohus in her mother's fief in Bohusl\u00e4n. Her mother had plans to take control over Danish Scania, next to her duchy. The marriage was arranged with the terms that Mecklenburg, Saxony, Holstein, Rendsburg and Schleswig would assist Ingeborg in the conquest of Scania. This was approved by the council of Norway but not Sweden. When Ingeborg's forces under command of \nKnut Porse of Varberg, invaded Scania in 1322\u201323, Mecklenburg betrayed her and the alliance was broken. Eventually, the affair of Euphemia's marriage led to a conflict between Ingeborg and the governments of Sweden and Norway, which led to the demise of Ingeborg's political position in the guardian governments. The marriage took place anyway, after a fifteen-year engagement. Euphemia did not lack influence in Sweden. She is known to have acted as the witness of seals in several documents. In 1335, when King Magnus appointed Nils Abj\u00f6rnsson (Sparre av Tofta) to drots, the condition that Euphemia would act as his adviser was included in his appointment.\n\nDuchess of Mecklenburg\nEuphemia was married in Rostock on April 10, 1336, to her distant kinsman, Albert II, Duke of Mecklenburg (1318 \u2013 2 February 1379), a North-German lord deeply interested in obtaining some power in Scandinavia. Later the same year, the couple returned to Sweden with Rudolf of Saxony and Henry of Holstein to be present at the coronation of her brother and sister-in-law Blanche of Namur. In Germany, Euphemia's life as a Duchess consort of Mecklenburg does not appear to have affected her status in Sweden, as she was still a political factor there and her name was still placed on various documents. She was the mistress of a very expensive ducal court. In 1340\u201341, she convinced Magnus to grant renewed trading privileges in Norway to the Hanseatic cities of Mecklenburg, Rostock and Wismar. On 15 April 1357, she granted her the estates Hammar and Farthses  to Sk\u00e4nninge Abbey following the deaths of her half-brothers Haakon and Canute in 1350. She was last confirmed alive 27 October 1363, when she gave up the ownership of her dower estate in Mecklenburg. Her death year is not known, but she is confirmed dead 16 June 1370, when her widower made a vicaria to her memory. Euphemia lived  to see her own second son depose her brother from the Swedish throne, and ascend as King Albert of Sweden in 1364.\n\nIssue\nAt the time of her death, she had five surviving children:\n\nHenry III, Duke of Mecklenburg (c. 1337\u20131383); Married, firstly, Ingeborg of Denmark (1347\u2013c. 1370), eldest daughter of sonless King Waldemar IV of Denmark. They had children: Albert (claimant to position of Hereditary Prince of Denmark), Euphemia, Mary, and Ingeborg. Henry III married, secondly, Matilda of Werle.\nAlbert III, Duke of Mecklenburg  (1340\u20131412), King of Sweden from 1364 to 1389. Married, firstly, in 1359, Richardis of Schwerin (died 1377); they had children: Eric I, Duke of Mecklenburg (Hereditary Prince of Sweden) and Richardis Catherine. Albert married, secondly, Agnes of Brunswick-L\u00fcneburg (d. 1434).\nMagnus I, Duke of Mecklenburg (d. 1385); married, in 1369, Elisabeth of Pomerania-R\u00fcgen. They had at least one son, John and possibly the daughter, Euphemia\nIngeborg of Mecklenburg (d. c. 1395); she married, firstly, Louis VI the Roman, Duke of Bavaria (1330\u20131365);  Married  secondly, Henry II, Count of Holstein-Rendsburg (c. 1317\u20131384); had several children: Gerhard, Albert, Henry, and Sophia.\nAnna of Mecklenburg (died 1415); married in 1362/6 Count Adolf of Holstein (died 1390).\n\nAncestry\nPassage 9:\nHenry III, Duke of Mecklenburg\nHenry III, Duke of Mecklenburg (c. 1337 \u2013 24 April 1383) was Duke of Mecklenburg from 1379 until his death.\n\nLife\nHenry was the first son of Duke Albert II of Mecklenburg and his wife Euphemia of Sweden, the sister of King Magnus IV of Sweden.\nHenry III was first married in 1362 to Ingeborg of Denmark, daughter of King Valdemar IV of Denmark.  They had four children:\n\nAlbrecht IV, co-regent of Mecklenburg from 1383 to 1388\nEuphemia, married from 1377 to John V of Werle-G\u00fcstrow\nMaria of Mecklenburg-Schwerin, mother of Eric of Pomerania, married to Duke Wartislaw VII of Pomerania\nIngeborg, from 1398 the abbess of the Poor Clares abbey in Ribnitz.After Ingeborg's death, Henry was married on 26 February 1377 to Matilda of Werle, the daughter of Lord Bernard II of Werle.  This marriage remained childless.\nAfter an accident at a tournament in Wismar, Henry III died on 24 April 1383 at his castle in Schwerin and was buried in the Doberan Minster.  His brother Magnus I and his son Albert IV took up a brief joint rule of Mecklenburg, which lasted until 1384.\n\nExternal links\nGenealogical table of the House of Mecklenburg\n\n\n== Footnotes ==\nPassage 10:\nChristopher, Duke of Mecklenburg\nChristopher, Duke of Mecklenburg-Gadebusch (30 July 1537 \u2013 4 March 1592) was a son of Albrecht VII, Duke of Mecklenburg.  He was Duke of Mecklenburg-Gadebusch, as well as administrator of Ratzeburg and of the Commandery of Mirow.\n\nLife\nChristopher was born in Augsburg. At the urging of his elder brother John Albert I, the cathedral chapter appointed Christopher as the successor of Bishop Christopher I of Ratzeburg in 1554.  Christopher thus became the first Lutheran administrator of the Bishopric.\nIn 1555, he was also elected coadjutor of Bishop William of Riga, with the right of succession.  His election was controversial and led to armed clashes.  During a clash on 1 July 1556 in Koknese, Christoper and William were both taken prisoner.  They were released in 1557, and Christopher was recognized as coadjutor.  However, when William died in 1563, Christopher found himself unable to exercise his right of succession.  Instead, he was taken prisoner again during renewed fighting against Poland.  He was released in 1569, after he had renounced all claims on Riga.  After his release, he returned to Mecklenburg.\nHe died on 4 March 1592 at Tempzin Abbey and was buried in the northern chapel of the high choir of Schwerin Cathedral.  His widow commissioned a grave monument, which shows a couple kneeling before a prie-dieu.  It was crafted in the workshop of the Flemish sculptor Robert Coppens, with assistance from the Pomeranian painter Georg Strachen.\n\nMarriages and issue\nChristopher married his first wife on 27 October 1573 in Kolding.  She was Princess Dorothea of Denmark (1528 \u2013 11 November 1575), a daughter of King Frederick I of Denmark.  She died only two years later, in Sch\u00f6nberg, which was the capital of the Prince-Bishopric of Ratzeburg.\nHe married his second wife on 7 May 1581 in Stockholm. She was Princess Elizabeth of Sweden (4 April 1549 \u2013 12 November 1597), a daughter of King Gustav I of Sweden. With her he had a daughter:\n\nMargaret Elisabeth (11 July 1584 \u2013 16 November 1616), married on 9 October 1608 to John Albert II, Duke of Mecklenburg.After Christopher's death, she returned to Sweden, where she lived in Norrk\u00f6ping.  She died in 1616 and was buried in Uppsala Cathedral.", "answers": ["1317"], "length": 2826, "dataset": "2wikimqa_e", "language": "en", "all_classes": null, "_id": "40877325ac5773a0259a6e7a86ab477a4654a4cf8f94c149"}/n
“input”: This is the question to be answered.
“context”: This is the information needed to answer the question.
“answer”: This is the correct answer(ground truth) to the question.

Task Instructions:
(1) Generate a full and concise reasoning path from the "input" question to the ground truth "answer", using sentences from the "context" to support each step.
(2) For each step in the reasoning path, include one unaltered sentence from the “context” to demonstrate how the information leads to the answer.
(3) Structure the response as a JSON object. Each reasoning step should correspond to one original sentence from the “context”.

Use JSON format with 'step' and 'sentence' for your output.
{
  "reasoning": [
    {
      "step": 1,
      "sentence": "<insert first sentence used from context>"
    },
    {
      "step": 2,
      "sentence": "<insert second sentence used from context>"
    },
    ...
  ]
}
Ensure each “sentence” is copied exactly as in the context without any modifications.