question: In 1749, Britain and France agreed to keep the island neutral, but Britain took control after 1763, prompting France to capture the island in 1781, then Britain to recapture the island in 1793. The population in 1771 was 5,084, of which only 243 were white and 4,716 were slaves. In 1791 the population was 15,020, of which 541 were white and 14,170 were slaves. There were then 37 sugar factories, 99 cotton factories, and 4 coffee factories. After nutmeg was discovered in 1768, 40 nutmeg plantations were started. The island became a British acquisition for good in 1802, with a ratified treaty in 1814.
Answer this question: How many years after the island became a British acquisition was the treaty ratified?
answer: 12

question: At the same time, the Dutch organized incursions against the Portuguese possessions in Africa in order to take control of the slave trade and complete the trade triangle that would ensure the economic prosperity of New Holland. In 1626, a Dutch expedition to take Elmina was almost wiped out in an ambush by the Portuguese, but in 1637, Elmina fell to the Dutch. In 1641 , the Dutch captured the island of Sao Tome and before the end of 1642, the rest of Portuguese Gold Coast followed. In August 1641 the Dutch formed a three-way alliance with the Kingdom of Kongo and Queen Nzinga of Ndongo, and with their assistance captured Luanda and Benguela, though without preventing the Portuguese from retreating inland into strongholds like Massangano, Ambaca and Muxima. With a steady source of slaves now secure, the Dutch abstained from further action, presuming that their allies would suffice against the Portuguese. Nonetheless, lacking artillery and firearms, Queen Nzinga and the Kongo proved unable to decisively defeat the Portuguese and their cannibalistic Imbangala allies.
Answer this question: What happened first: Elmina fell to the Dutch or the Dutch captured the island of Sao Tome?
answer: Elmina fell to the Dutch

question: According to Sidney Harcave, author of The Russian Revolution of 1905 , four problems in Russian society contributed to the revolution. Newly emancipated peasants earned too little and were not allowed to sell or mortgage their allotted land. Ethnic minorities resented the government because of its "Russification", discrimination and repression, such as banning them from voting and serving in the Imperial Guard or Navy and limited attendance in schools. A nascent industrial working class resented the government for doing too little to protect them, banning strikes and labor unions. Finally, radical ideas fomented and spread after a relaxing of discipline in universities allowed a new consciousness to grow among students. Taken individually, these issues might not have affected the course of Russian history, but together they created the conditions for a potential revolution. "At the turn of the century, discontent with the Tsar's dictatorship was manifested not only through the growth of political parties dedicated to the overthrow of the monarchy but also through industrial strikes for better wages and working conditions, protests and riots among peasants, university demonstrations, and the assassination of government officials, often done by Socialist Revolutionaries." Because the Russian economy was tied to European finances, the contraction of Western money markets in 1899-1900 plunged Russian industry into a deep and prolonged crisis which outlasted the dip in European industrial production. This setback aggravated social unrest during the five years preceding the revolution of 1905. The government finally recognized these problems, albeit in a shortsighted and narrow-minded way. The minister of interior Plehve stated in 1903 that, after the agrarian problem, the most serious issues plaguing the country were those of the Jews, the schools, and the workers, in that order.
Answer this question: How many years did the prolonged crisis cause aggravated social unrest?
answer:
5