question: In 1227 the Livonian Brothers of the Sword conquered all Danish territories in Northern Estonia. After the Battle of Saule the surviving members of the Brothers of the Sword merged into the Teutonic Order of Prussia in 1237 and became known as Livonian Order. On 7 June 1238, by the Treaty of Stensby, the Teutonic knights returned the Duchy of Estonia to Valdemar II, until in 1346, after St. George's Night Uprising, the lands were sold back to the order and became part of the Ordenstaat. After the conquest, all of the remaining local population were ostensibly Christianized. In 1535, the first extant native language book was printed, a Lutheran catechism. The conquerors upheld military control through their network of castles throughout Estonia and Latvia. The land was divided into six feudal principalities by Papal Legate William of Modena: Archbishopric of Riga, Bishopric of Courland, Bishopric of Dorpat, Bishopric of Ösel-Wiek, the lands ruled by the Livonian Brothers of the Sword and Dominum directum of King of Denmark, the Duchy of Estonia.
Answer this question: How many years after the Teutonic knights returned the Duchy of Estonia to Valdemar II did the lands get sold back to the order and became part of the Ordenstaat?
answer: 108

question: In 1920-21 the only "solution" to this dispute could come either by military victory—as basically happened in Anatolia, Zangezur and Nakhchivan—or by the imposition from above of a new structure by an imperial power. After the British failed to impose a settlement, the imperial arbiters turned out to be the Bolsheviks, whose 11th Army conquered Karabakh in May 1920. On 5 July 1921 the Bolsheviks' Caucasian committee, the Kavbiuro, under the chairmanship of Joseph Stalin ruled that the mountainous part of Karabakh would be part of Azerbaijan. In July 1923 the Nagorny  Karabakh Autonomous Region  was created within Azerbaijan, with borders that gave it an overwhelming Armenian majority of 94% of the total inhabitants.
Answer this question: How many months passed from when the Army conquered Karabakh in May 1920 to when Joseph Stalin ruled that the mountainous part of Karabakh would be part of Azerbaijan?
answer: 14

question: From the Act of Union on 1 January 1801, until 6 December 1922, the island of Ireland was part of the United Kingdom of Great Britain and Ireland. During the Great Famine, from 1845 to 1849, the island's population of over 8 million fell by 30%. One million Irish died of starvation and/or disease and another 1.5 million emigrated, mostly to the United States. This set the pattern of emigration for the century to come, resulting in a constant population decline up to the 1960s.
Answer this question: How many years did it take for Ireland's population to fall by 30%?
answer:
4