question: Who is the mother-in-law of Mary Of Lusignan, Countess Of Brienne?
context: [["Erard II, Count of Brienne", ["Erard II of Brienne( died 1191) was count of Brienne from 1161 to 1191, and a French general during the Third Crusade, most notably at the Siege of Acre.", "He was the son of Gautier II, count of Brienne, and Ad\u00e8le of Baudemont, daughter of Andrew, lord of Baudemont and Agnes of Braine.", "His paternal grandparents were Erard I, Count of Brienne and Alix de Roucy.", "During this siege he saw his brother Andr\u00e9 of Brienne die on 4 October 1189, before being killed himself on 8 February 1191.", "Erard II's nephew was Erard of Brienne- Ramerupt.", "Before 1166 he married Agn\u00e8s of Montfaucon( \u2020 after 1186), daughter of Amadeus II of Montfaucon and of B\u00e9atrice of Grandson- Joinville.", "Their children were:"]], ["John, Count of Brienne", ["John, Count of Brienne( c. 1235 \u2013 c. 1260) was the eldest son of Walter IV of Brienne and Marie of Lusignan, a princess of Cyprus.", "He inherited the County of Brienne on his father's death in 1246, but preferred to live among his mother's relatives at the court of Cyprus, and played little part in international politics.", "In 1255, he married Marie, Lady of Thieusies( in Hainaut), the daughter of Sohier II of Enghien.", "They had no children, and when he died, he was succeeded by his brother Hugh."]], ["Walter IV, Count of Brienne", ["Walter IV the Great of Brienne ((1205\u20131244) was Count of Brienne 1205\u20131244.", "He was the son of Walter III of Brienne and Elvira of Sicily.", "Around the time of his birth, his father lost his bid for the Sicilian throne and died in prison.", "His inheritance of the Principality of Taranto and the County of Lecce was confiscated.", "While a teenager, Walter was sent to Outremer where his uncle John of Brienne was the ruler of Jerusalem.", "In 1221 John gave him the County of Jaffa and Ascalon, and arranged a marriage with Marie de Lusignan (before March, 1215 \u2013 ca. 1252 or 1254), daughter of Hugh I of Cyprus, in 1233.", "Even after his uncle had been forced out of the Kingdom by Frederick II, Walter remained one of the most important lords of the Kingdom of Jerusalem.", "He was commander of the Crusader army that marched against the forces of As-Salih Ayyub in 1244.", "Against the advice of al-Mansur of Homs, his Syrian ally, Walter insisted on taking the offensive, rather than fortifying his camp and awaiting the retreat of the Khwarezmians.", "In the disastrous Battle of La Forbie, the Crusader-Syrian forces were nearly annihilated.", "Walter was captured, tortured before the walls of Jaffa, and ultimately turned over to the Egyptians after the Khwarezmian defeat before Homs in 1246.", "He was imprisoned in Cairo and murdered by merchants whose caravans he had robbed, with the sultan's consent.", "He was succeeded by his elder son John, who died childless.", "His younger son Hugh of Brienne settled in Southern Italy and became a partisan of Charles of Anjou, who returned to him the family's county of Lecce."]], ["Maria Thins", ["Maria Thins( c. 1593 \u2013 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family."]], ["Yolanda of Lusignan", ["Yolanda of Lusignan or Yolande I & I de Lusignan, Countess of La Marche (24 March 1257 \u2013 30 September 1314) was a French noblewoman and peeress.", "In 1308, she succeeded her brother Guy I as suo jure Dame of Lusignan, of Couh\u00e9 and of Peyrat, and \"suo jure\" Countess of La Marche, but not as Countess of Angoul\u00eame since after her brother's death the county was sold by her sisters, Joan and Isabelle, to King Philip IV and annexed to the French Crown.", "Yolanda was also the heiress of Foug\u00e8res, which she succeeded to upon her mother's death sometime after 1273."]], ["Eldon Howard", ["Eldon Howard was a British screenwriter.", "She was the mother- in- law of Edward J. Danziger and wrote a number of the screenplays for films by his company Danziger Productions."]], ["Marian Shields Robinson", ["Marian Lois Robinson( n\u00e9e Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama."]], ["Priscilla Pointer", ["Priscilla Marie Pointer( born May 18, 1924) is an American stage, film and television character actress.", "She began her career in the theater, including productions on Broadway.", "Later, Pointer moved to Hollywood to act in films and on television.", "She is the mother of Amy Irving, therefore making her the former mother- in- law of filmmakers Steven Spielberg and Bruno Barreto and the mother- in- law of documentary filmmaker Kenneth Bowser, Jr."]], ["Mary of Lusignan, Countess of Brienne", ["Mary of Lusignan (French: Marie de Lusignan; before March 1215 \u2013 5 July 1251 or 1253), was the wife of Count Walter IV of Brienne and Countess of Brienne from the time of her marriage in 1233 to her husband's death while on Crusade in 1244.", "Mary's parents were King Hugh I of Cyprus and Alice of Champagne, making her a maternal granddaughter of Queen Isabella I of Jerusalem.", "Her two surviving sons were John, Count of Brienne, and Hugh of Brienne."]], ["Erard I, Count of Brienne", ["Erard I, Count of Brienne( 1060 \u2013 1114) was Count of Brienne at the end of the 11th century.", "He was the son of Gautier I of Brienne, count of Brienne, and his wife Eustachie of Tonnerre.", "In 1097 he fought in the First Crusade.", "In 1110 he married Alix of Roucy- Ramerupt, daughter of Andr\u00e9 de Montdidier- Roucy, seigneur de Ramerupt.", "They had 3 children:"]]]
supporting_facts: [["Mary of Lusignan, Countess of Brienne", 0], ["Walter IV, Count of Brienne", 1]]
evidences: [["Mary of Lusignan, Countess of Brienne", "spouse", "Walter IV of Brienne"], ["Walter IV the Great of Brienne", "mother", "Elvira of Sicily"]]
answer: Elvira of Sicily