Question: In what year was the father of Blanche of Castile born?

full_context: Document 1: Louis IX of France: Louis IX (25 April 1214 – 25 August 1270), commonly known as Saint Louis, was King of France and a canonized saint. Louis was crowned in Reims at the age of 12, following the death of his father Louis VIII the Lion, although his mother, Blanche of Castile, ruled the kingdom until he reached maturity. During Louis's childhood, Blanche dealt with the opposition of rebellious vassals and put an end to the Albigensian crusade which had started 20 years earlier.
Document 2: Blanche of Castile: Blanche of Castile (Spanish: "Blanca" ; 4 March 1188 – 27 November 1252) was Queen of France by marriage to Louis VIII. She acted as regent twice during the reign of her son, Louis IX: during his minority from 1226 until 1234, and during his absence from 1248 until 1252. She was born in Palencia, Spain, 1188, the third daughter of Alfonso VIII, king of Castile, and Eleanor of England. Eleanor was a daughter of Henry II of England and Eleanor of Aquitaine.
Document 3: Henry I of Castile: Henry I of Castile (14 April 1204 – 6 June 1217) was king of Castile. He was the son of Alfonso VIII of Castile and Eleanor of England, Queen of Castile (daughter of Henry II of England and Eleanor of Aquitaine).
Document 4: Henry II of England: Henry II (5 March 1133 – 6 July 1189), also known as Henry Curtmantle (French: "Court-manteau" ), Henry FitzEmpress or Henry Plantagenet, ruled as Count of Anjou, Count of Maine, Duke of Normandy, Duke of Aquitaine, Count of Nantes, King of England and Lord of Ireland; at various times, he also controlled Wales, Scotland and Brittany. Henry was the son of Geoffrey of Anjou and Matilda, daughter of Henry I of England. He became actively involved by the age of 14 in his mother's efforts to claim the throne of England, then occupied by Stephen of Blois, and was made Duke of Normandy at 17. He inherited Anjou in 1151 and shortly afterwards married Eleanor of Aquitaine, whose marriage to Louis VII of France had recently been annulled. Stephen agreed to a peace treaty after Henry's military expedition to England in 1153, and Henry inherited the kingdom on Stephen's death a year later.
Document 5: Joan of England, Queen of Sicily: Joan of England (October 1165 – 4 September 1199) was a queen consort of Sicily and countess consort of Toulouse. She was the seventh child of Henry II, King of England and his queen consort, Eleanor of Aquitaine.
Document 6: Sancha, heiress of León: Sancha of León (born 1191 or 1192) was the eldest child and daughter of Alfonso IX of León by his first queen, Theresa of Portugal. She was raised at the court of their father, but her younger sister Dulce and her brother Ferdinand were raised with their mother in Portugal after the annulment of their parents' marriage in 1195. Although in Castile it was customary for females to inherit, and Sancha's stepmother became queen, briefly, of Castile, in León female succession was barred, although her ancestor Urraca had been the first queen regnant of Western Europe.
Document 7: England in the High Middle Ages: England in the High Middle Ages includes the history of England between the Norman Conquest in 1066 and the death of King John, considered by some to be the last of the Angevin kings of England, in 1216. A disputed succession and victory at the Battle of Hastings led to the conquest of England by William of Normandy in 1066. This linked the crown of England with possessions in France and brought a new aristocracy to the country that dominated landholding, government and the church. They brought with them the French language and maintained their rule through a system of castles and the introduction of a feudal system of landholding. By the time of William's death in 1087, England formed the largest part of an Anglo-Norman empire, ruled by nobles with landholdings across England, Normandy and Wales. William's sons disputed succession to his lands, with William II emerging as ruler of England and much of Normandy. On his death in 1100 his younger brother claimed the throne as Henry I and defeated his brother Robert to reunite England and Normandy. Henry was a ruthless yet effective king, but after the death of his only male heir in the White Ship tragedy, he persuaded his barons to recognise his daughter Matilda as heir. When Henry died in 1135 her cousin Stephen of Blois had himself proclaimed king, leading to a civil war known as The Anarchy. Eventually Stephen recognised Matilda's son Henry as his heir and when Stephen died in 1154, he succeeded as Henry II.
Document 8: Bonne of Luxembourg: Bonne of Luxemburg or "Jutta of Luxemburg" (20 May 131511 September 1349), was born Jutta (Judith), the second daughter of John the Blind, king of Bohemia, and his first wife, Elisabeth of Bohemia. She was the first wife of King John II of France; however, as she died a year prior to his accession, she was never a French queen. Jutta was referred to in French historiography as Bonne de Luxembourg. She was a member of the House of Luxembourg. Among her children were Charles V of France, Philip II, Duke of Burgundy, and Joan, Queen of Navarre.
Document 9: England and King David I: The relationship between the Kingdom of England and King David I, who was King of Scotland between 1124 and 1153, was partly shaped by David's relationship with the particular King of England, and partly by David's own ambition. David had a good relationship with and was an ally of Henry I of England, the King who was largely responsible for David's early career. After Henry's death, David upheld his support for his niece, the former Empress-consort, Matilda, and expanded his power in northern England in the process, despite his defeat at the Battle of the Standard in 1138.
Document 10: Dual monarchy of England and France: The dual monarchy of England and France existed during the latter phase of the Hundred Years' War when Charles VII of France and Henry VI of England disputed the succession to the throne of France. It commenced on 21 October 1422 upon the death of King Charles VI of France, who had signed the Treaty of Troyes which gave the French crown to his son-in-law Henry V of England and Henry's heirs. It excluded King Charles's son, the Dauphin Charles, who by right of primogeniture was the heir to the Kingdom of France. Although the Treaty was ratified by the Estates-General of France, the act was a contravention of the French law of succession which decreed that the French crown could not be alienated. Henry VI, son of Henry V, became king of both England and France and was recognized only by the English and Burgundians until 1435 as King Henry II of France. He was crowned King of France on 16 December 1431.
Document 11: Empress Matilda: Empress Matilda (c. 7 February 110210 September 1167), also known as the Empress Maude, was the claimant to the English throne during the civil war known as the Anarchy. The daughter of King Henry I of England, she moved to Germany as a child when she married the future Holy Roman Emperor Henry V. She travelled with her husband into Italy in 1116, was controversially crowned in St. Peter's Basilica, and acted as the imperial regent in Italy. Matilda and Henry had no children, and when Henry died in 1125, the crown was claimed by Lothair II, one of his political enemies.
Document 12: María de Molina: María Alfonso Téllez de Meneses (c. 1265 – 1321), known as María de Molina, was queen consort of Castile and León from 1284 to 1295 by marriage to Sancho IV of Castile, and served as regent for her minor son Ferdinand IV (1295 - c.1301) and later her grandson Alfonso XI of Castile (1312-1321).
Document 13: Henry II of France: Henry II (French: "Henri II" ; 31 March 1519 – 10 July 1559) was a monarch of the House of Valois who ruled as King of France from 31 March 1547 until his death in 1559. The second son of Francis I, he became Dauphin of France upon the death of his elder brother Francis III, Duke of Brittany, in 1536.
Document 14: Eleanor de Clare: Eleanor de Clare, suo jure 6th Lady of Glamorgan (3 October 1292-30 June 1337) was a powerful English noblewoman who married Hugh Despenser the Younger and was a granddaughter of Edward I of England. With her sisters, Elizabeth de Clare and Margaret de Clare, she inherited her father's estates after the death of her brother, Gilbert de Clare, 8th Earl of Gloucester, 7th Earl of Hereford at the Battle of Bannockburn in 1314. She was born in 1292 at Caerphilly Castle in Glamorgan, Wales and was the eldest daughter of Gilbert de Clare, 6th Earl of Hertford, 7th Earl of Gloucester, 5th Lord of Glamorgan and Princess Joan of Acre.
Document 15: Catherine of Lancaster: Catherine of Lancaster (Castilian: "Catalina"; 31 March 1373 – 2 June 1418) was Queen of Castile by marriage to King Henry III of Castile. She governed Castile as regent from 1406 until 1418 during the minority of her son.
ground_truth: 1133