question: When did John Beaufort, Marquess Of Dorset's father die?
context: [["Harry Wainwright (footballer)", ["Harry Wainwright( born 1899; date of death unknown) was an English footballer."]], ["Thomas Grey, 2nd Marquess of Dorset", ["Thomas Grey, 2nd Marquess of Dorset( 22 June 147710 October 1530) was an English peer, courtier, soldier, and landowner."]], ["John Beaufort, Marquess of Dorset", ["John Beaufort, Marquess of Dorset, Earl of Dorset (b. 1441 \u2013 d. 4 May 1471) was a scion of the Beaufort family, who fought for the Lancastrians in the Wars of the Roses.", "He was the third son of Edmund Beaufort, 2nd Duke of Somerset and his wife, Lady Eleanor Beauchamp, daughter of Richard de Beauchamp, Earl of Warwick.", "When his eldest brother, Henry Beaufort, 3rd Duke of Somerset, was killed fighting for Lancaster in 1464 at the Battle of Hexham, the next brother, Edmund, succeeded to the Dukedom, and John became \"Marquess of Dorset\" and \"Earl of Dorset\", courtesy titles granted to the Beaufort heir-apparent or heir-presumptive.", "These titles were not recognized by King Edward IV, of the House of York.", "John had been in exile since 1461, first in Burgundy", "and then France.", "When Henry VI of Lancaster reclaimed the throne in October 1470, John returned with his brother Edmund.", "But a few months later, Henry was driven from the throne again, and the Lancastrians were on the run.", "John was killed in the Battle of Tewkesbury on 4 May 1471, while fighting beside Edmund, who was captured and beheaded two days later.", "John left behind no issue and was never married.", "With the death of John and Edmund, the legitimate male line of the Beauforts ended."]], ["Theodred II (Bishop of Elmham)", ["Theodred II was a medieval Bishop of Elmham.", "The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997."]], ["Henry Beaufort, 2nd Earl of Somerset", ["Henry Beaufort, 2nd Earl of Somerset(\" probably\" 26 November 1401 \u2013 25 November 1418) was the eldest son of John Beaufort, 1st Earl of Somerset, and the grandson of John of Gaunt, 1st Duke of Lancaster and Katherine Swynford.", "Henry succeeded his father as Earl of Somerset on 16 March 1410.", "During his minority, his mother, Margaret Beaufort, Countess of Somerset held his lands for him until he reached the age of 15.", "When Henry was seventeen, he was placed under the command of Thomas Beaufort, Duke of Exeter, his uncle, at the Siege of Rouen during the Hundred Years'", "War where he, as well as a number of other nobles, met his demise, although the exact reasons of his death are unknown.", "He never married and was succeeded by his younger brother, John Beaufort, 1st Duke of Somerset."]], ["Bill Smith (footballer, born 1897)", ["William Thomas Smith( born 9 April 1897, date of death unknown) was an English professional footballer."]], ["Etan Boritzer", ["Etan Boritzer( born 1950) is an American writer of children \u2019s literature who is best known for his book\" What is God?\" first published in 1989.", "His best selling\" What is?\" illustrated children's book series on character education and difficult subjects for children is a popular teaching guide for parents, teachers and child- life professionals.", "Boritzer gained national critical acclaim after\" What is God?\" was published in 1989 although the book has caused controversy from religious fundamentalists for its universalist views.", "The other current books in the\" What is?\" series include", "What is Love?,", "What is Death?,", "What is Beautiful?,", "What is Funny?,", "What is Right?,", "What is Peace?,", "What is Money?,", "What is Dreaming?,", "What is a Friend?,", "What is True?,", "What is a Family?,", "What is a Feeling?\"", "The series is now also translated into 15 languages.", "Boritzer was first published in 1963 at the age of 13 when he wrote an essay in his English class at Wade Junior High School in the Bronx, New York on the assassination of John F. Kennedy.", "His essay was included in a special anthology by New York City public school children compiled and published by the New York City Department of Education.", "Boritzer now lives in Venice, California and maintains his publishing office there also.", "He has helped numerous other authors to get published through\" How to Get Your Book Published!\" programs.", "Boritzer is also a yoga teacher who teaches regular classes locally and guest- teaches nationally.", "He is also recognized nationally as an erudite speaker on\" The Teachings of the Buddha.\""]], ["Edmund Beaufort, 2nd Duke of Somerset", ["Edmund Beaufort, 2nd Duke of Somerset, KG (22 May 1455), was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War.", "He also succeeded in the title of 4th Earl of Somerset and was created 1st Earl of Dorset and", "1st Marquess of Dorset (previously held by his father and later forfeited), and Count of Mortain.", "He was known for his deadly rivalry with Richard of York, 3rd Duke of York."]], ["John Beaufort, 1st Duke of Somerset", ["John Beaufort, 1st Duke of Somerset( c. 1403 \u2013 27 May 1444) was an English nobleman and military commander during the Hundred Years' War."]], ["Thomas Scott (diver)", ["Thomas Scott( 1907- date of death unknown) was an English diver."]]]
supporting_facts: [["John Beaufort, Marquess of Dorset", 1], ["Edmund Beaufort, 2nd Duke of Somerset", 0]]
evidences: [["John Beaufort, Marquess of Dorset", "father", "Edmund Beaufort"], ["Edmund Beaufort", "date of death", "22 May 1455"]]
answer: 22 May 1455