question: When did Petre Bagration-Gruzinsky's father die?
context: [["Albert Thompson (footballer, born 1912)", ["Albert Thompson( born 1912, date of death unknown) was a Welsh footballer."]], ["Bill Smith (footballer, born 1897)", ["William Thomas Smith( born 9 April 1897, date of death unknown) was an English professional footballer."]], ["Harry Wainwright (footballer)", ["Harry Wainwright( born 1899; date of death unknown) was an English footballer."]], ["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."]], ["Petre Bagration-Gruzinsky", ["Petre Aleksandres dze Bagrationi Gruzinsky  (26 April 1857 \u2013 3 February 1922) was a Georgian prince (\"batonishvili\"), a descendant of the Kakhetian branch (Gruzinsky) of the Bagrationi dynasty, the former royal house of Georgia.", "Petre was the son of Prince Alexander Bagration-Gruzinsky.", "Prince Petre married Princess Tamara Dekanozishvili (1897\u20131977) at the Navtlugi Church of St. Barbara in Tbilisi in 1915 and had two sons:"]], ["Alexander Bagration-Gruzinsky", ["Aleksandre Bagratis dze Bagrationi Gruzinsky  (1820-1865) was a Georgian prince (\"batonishvili\"), a descendant of the Kakhetian branch (Gruzinsky) of the Bagrationi dynasty, the former royal house of Georgia.", "Alexander was a son of Prince Bagrat of Georgia, the 4th son of king George XII of Georgia."]], ["Thomas Scott (diver)", ["Thomas Scott( 1907- date of death unknown) was an English diver."]], ["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.\""]], ["Petre Gruzinsky", ["Prince Petre Petres dze Bagrationi Gruzinsky( 28 March 1920 \u2013 13 August 1984) was a Georgian poet and Honored Artist of the Georgian SSR( 1979).", "He was a son of Prince Petre Bagration- Gruzinsky and a scion of King George XII of Georgia."]], ["Ana Bagration-Gruzinsky", ["Ana Nugzaris asuli Bagration- Gruzinsky( born 1 November 1976) is a royal princess of the Gruzinsky branch of the Bagrationi dynasty of Georgia."]]]
supporting_facts: [["Petre Bagration-Gruzinsky", 1], ["Alexander Bagration-Gruzinsky", 0]]
evidences: [["Petre Bagration-Gruzinsky", "father", "Alexander Bagration-Gruzinsky"], ["Alexander Bagration-Gruzinsky", "date of death", "1865"]]
answer: 1865