Question: I know that the answer to the question "Why were the Chinese able to increase in numbers?" is in "China also began suffering from mounting overpopulation during this period. Population growth was stagnant for the first half of the 17th century due to civil wars and epidemics, but prosperity and internal stability gradually reversed this trend. The introduction of new crops from the Americas such as the potato and peanut allowed an improved food supply as well, so that the total population of China during the 18th century ballooned from 100 million to 300 million people. Soon all available farmland was used up, forcing peasants to work ever-smaller and more intensely worked plots. The Qianlong Emperor once bemoaned the country's situation by remarking "The population continues to grow, but the land does not." The only remaining part of the empire that had arable farmland was Manchuria, where the provinces of Jilin and Heilongjiang had been walled off as a Manchu homeland. The emperor decreed for the first time that Han Chinese civilians were forbidden to settle. Mongols were forbidden by the Qing from crossing the borders of their banners, even into other Mongol Banners and from crossing into neidi (the Han Chinese 18 provinces) and were given serious punishments if they did in order to keep the Mongols divided against each other to benefit the Qing.". Can you tell me what it is?
Answer: prosperity and internal stability

Question: I know that the answer to the question "What is the name for a Polish dance done in triple time?" is in "A reconciliation of these views is suggested by William Atwood: "Undoubtedly [Chopin's] use of traditional musical forms like the polonaise and mazurka roused nationalistic sentiments and a sense of cohesiveness amongst those Poles scattered across Europe and the New World ... While some sought solace in [them], others found them a source of strength in their continuing struggle for freedom. Although Chopin's music undoubtedly came to him intuitively rather than through any conscious patriotic design, it served all the same to symbolize the will of the Polish people ..."". Can you tell me what it is?
Answer: mazurka

Question: I know that the answer to the question "Which happened first, the program and statutes of the movement were published or the Ukrainian Language Society held its founding congress?" is in "In Ukraine, Lviv and Kiev celebrated Ukrainian Independence Day on January 22, 1989. Thousands gathered in Lviv for an unauthorized moleben (religious service) in front of St. George's Cathedral. In Kiev, 60 activists met in a Kiev apartment to commemorate the proclamation of the Ukrainian People's Republic in 1918. On February 11–12, 1989, the Ukrainian Language Society held its founding congress. On February 15, 1989, the formation of the Initiative Committee for the Renewal of the Ukrainian Autocephalous Orthodox Church was announced. The program and statutes of the movement were proposed by the Writers Association of Ukraine and were published in the journal Literaturna Ukraina on February 16, 1989. The organization heralded Ukrainian dissidents such as Vyacheslav Chornovil.". Can you tell me what it is?
Answer:
the Ukrainian Language Society held its founding congress