Question: When did the place where Mater et Magistra's author died become its own country?

Context paragraphs:
paragraph_text: Magistra Hersend, also called Hersend or Magistra Hersend Physica ("floruit" 1249–1259, Paris) was a French female surgeon who accompanied King Louis IX of France on the Seventh Crusade in 1249. She is one of two women recorded as royal physician or surgeon.
title: Magistra Hersend
paragraph_text: Piper Kerman Kerman at the University of Missouri in 2014 Piper Eressea Kerman (1969 - 09 - 28) September 28, 1969 (age 49) Boston, Massachusetts, U.S. Alma mater Smith College Occupation Writer, author, memoirist Notable work Orange Is the New Black: My Year in a Women's Prison Spouse (s) Larry Smith (m. 2006) Website piperkerman.com www.thepipebomb.com
title: Piper Kerman
paragraph_text: Peggy Nadramia (born Margaret Nadramia) is an American magazine editor and administrator in the Church of Satan, of which she is the current High Priestess, and in which she is known as Magistra Nadramia, as well as the wife of current church head Peter H. Gilmore.
title: Peggy Nadramia
paragraph_text: Gloria Braggiotti Etting (1909 – 3 September 2003) was a dancer, newspaper columnist, photographer, and author. Her brother was composer Mario Braggiotti and her husband was artist Emlen Etting.
title: Gloria Braggiotti Etting
paragraph_text: Lino Grech died on the night of 1 December 2013, aged 83, at the Mater Dei Hospital in Msida. His funeral mass took place in his hometown of Sliema on 4 December. He was survived by his wife, Frances, and their children.
title: Lino Grech
paragraph_text: ``Courtesy of the Red, White and Blue (The Angry American) ''is a song written and recorded by American country music artist Toby Keith. The song was written in late 2001, and was inspired by Keith's father's death in March 2001, as well as the September 11, 2001 attacks on the United States later that year. It was released in May 2002 as the lead single from the album, Unleashed. The song topped the Billboard Hot Country Singles & Tracks chart and reached number 25 on the Billboard Hot 100 chart becoming his biggest solo hit on that chart.
title: Courtesy of the Red, White and Blue (The Angry American)
paragraph_text: Frederick Winslow Taylor Taylor circa 1900 March 20, 1856 (1856 - 03 - 20) Philadelphia, Pennsylvania, U.S. March 21, 1915 (1915 - 03 - 21) (aged 59) Philadelphia, Pennsylvania, U.S. Cause of death Pneumonia Resting place West Laurel Hill Cemetery Bala Cynwyd, Pennsylvania, U.S. Nationality American Education Phillips Exeter Academy Alma mater Stevens Institute of Technology (BS) Occupation Efficiency expert Management consultant Known for ``Father ''of the Scientific management & Efficiency Movement, Father of Industrial Engineering Home town Germantown, Philadelphia, Pennsylvania Spouse (s) Louise M. Spooner Children Kempton, Robert and Elizabeth (all adopted orphans) Parent (s) Franklin Taylor Emily Annette Winslow Awards Elliott Cresson Medal (1902)
title: Frederick Winslow Taylor
paragraph_text: Scarborough Country was an opinion/analysis show broadcast on MSNBC Monday to Thursday at 9 P.M. ET. It was hosted by former congressman Joe Scarborough.
title: Scarborough Country
paragraph_text: Pope John XXIII (25 November 1881 – 3 June 1963) and Pope John Paul II (18 May 1920 – 2 April 2005) reigned as popes of the Roman Catholic Church and the sovereigns of Vatican City (respectively from 1958 to 1963 and 1978 to 2005). Their canonizations were held on 27 April 2014. The decision to canonize was made official by Pope Francis on 5 July 2013 following the recognition of a miracle attributed to the intercession of John Paul II, while John XXIII was canonized for his merits of opening the Second Vatican Council. The date of the canonization was assigned on 30 September 2013.
title: Canonization of Pope John XXIII and Pope John Paul II
paragraph_text: Engleby is a novel by the author Sebastian Faulks. It tells the tale of a working-class boy who wins a place at an esteemed university and becomes a suspect in a murder investigation after the disappearance of a girl from a nearby college.
title: Engleby
paragraph_text: Veryl Switzer is a former halfback in the National Football League who played 24 games for the Green Bay Packers before serving in the United States Air Force for two years, playing professional football in Canada, and becoming an administrator at his alma mater Kansas State where he is a hall of famer.
title: Veryl Switzer
paragraph_text: The Delisle scale (°D) is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle (1688–1768). Delisle was the author of "Mémoires pour servir à l'histoire et aux progrès de l'Astronomie, de la Géographie et de la Physique" (1738).
title: Delisle scale
paragraph_text: Baron Gaston van de Werve et de Schilde (22 March 1867 – 18 August 1923) was a Belgian Roman Catholic politician. He was governor of the province of Antwerp from 16 December 1912 until his death on 18 August 1923 .
title: Gaston van de Werve et de Schilde
paragraph_text: Exhi (foaled 2007) was sired by Maria's Mon, and his dam was the Group 2-placed stakes winner Soldera (Polish Numbers). He is a homebred for Wertheimer et Frere and trained by Todd Pletcher.
title: Exhi
paragraph_text: The intended governing body of Germany was called the Allied Control Council. The commanders - in - chief exercised supreme authority in their respective zones and acted in concert on questions affecting the whole country. Berlin, which lay in the Soviet (eastern) sector, was also divided into four sectors with the Western sectors later becoming West Berlin and the Soviet sector becoming East Berlin, capital of East Germany.
title: History of Germany (1945–1990)
paragraph_text: The inquest into the death of Paul-Louis Halley took place in Oxford, England, in late October 2005. A jury returned a verdict of accidental death.
title: Paul-Louis Halley
paragraph_text: Joseph Chaumié (17 March 1849 – 19 July 1919) was a French politician, Senator for Lot-et-Garonne from 1897 until his death.
title: Joseph Chaumié
paragraph_text: The name Vatican city was first used in the Lateran Treaty, signed on 11 February 1929, which established the modern city - state. The name is taken from Vatican Hill, the geographic location of the state. ``Vatican ''is derived from the name of an Etruscan settlement, Vatica or Vaticum meaning garden, located in the general area the Romans called vaticanus ager,`` Vatican territory''.
title: Vatican City
paragraph_text: Mater et magistra is the encyclical written by Pope John XXIII on the topic of "Christianity and Social Progress". It was promulgated on 15 May 1961. The title means "mother and teacher", referring to the role of the church. It describes a necessity to work towards authentic community in order to promote human dignity. It taught that the state must sometimes intervene in matters of health care, education, and housing.
title: Mater et magistra
paragraph_text: Jean-Michel Iribarren (born 13 February 1958) is a French author. He is the author of "L'insecte", a monologue in which the AIDS virus speaks and the author denounces the silence that surrounded the death of homosexuals at the beginning of epidemic.
title: Jean-Michel Iribarren

Reasoning steps:
Mater et Magistra >> author >>>> John XXIII
John XXIII >> place of death >>>> Vatican City
when did Vatican City become its own country >>>> 11 February 1929

Answer: spans: 11 February 1929