Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
However Qing rule saw an massively increasing amount of Han Chinese both illegally and legally streaming into Manchuria and settling down to cultivate land as Manchu landlords desired Han Chinese peasants to rent on their land and grow grain, most Han Chinese migrants were not evicted as they went over the Great Wall and Willow Palisade, during the eighteenth century Han Chinese farmed 500,000 hectares of privately owned land in Manchuria and 203,583 hectares of lands which were part of coutrier stations, noble estates, and Banner lands, in garrisons and towns in Manchuria Han Chinese made up 80% of the population.
What percent of the population in Manchuria was Han?
A: 80%

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Efforts have been made to protect Guam's coral reef habitats from pollution, eroded silt and overfishing, problems that have led to decreased fish populations. (Since Guam is a significant vacation spot for scuba divers, this is important.) In recent years, the Department of Agriculture, Division of Aquatic and Wildlife Resources has established several new marine preserves where fish populations are monitored by biologists. Before adopting U.S. Environmental Protection Agency standards, portions of Tumon Bay were dredged by the hotel chains to provide a better experience for hotel guests. Tumon Bay has since been made into a preserve. A federal Guam National Wildlife Refuge in northern Guam protects the decimated sea turtle population in addition to a small colony of Mariana fruit bats.
What has led to the decrease of fish near Guam?
A: pollution, eroded silt and overfishing

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
As mayor, Young sought to revive the city by seeking to increase investment in the city's declining downtown. The Renaissance Center, a mixed-use office and retail complex, opened in 1977. This group of skyscrapers was an attempt to keep businesses in downtown. Young also gave city support to other large developments to attract middle and upper-class residents back to the city. Despite the Renaissance Center and other projects, the downtown area continued to lose businesses to the suburbs. Major stores and hotels closed and many large office buildings went vacant. Young was criticized for being too focused on downtown development and not doing enough to lower the city's high crime rate and improve city services.
What group of buildings opened in 1977?
A: The Renaissance Center

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
According to tradition, the Umayyad family (also known as the Banu Abd-Shams) and Muhammad both descended from a common ancestor, Abd Manaf ibn Qusai, and they originally came from the city of Mecca. Muhammad descended from Abd Manaf via his son Hashim, while the Umayyads descended from Abd Manaf via a different son, Abd-Shams, whose son was Umayya. The two families are therefore considered to be different clans (those of Hashim and of Umayya, respectively) of the same tribe (that of the Quraish). However Muslim Shia historians suspect that Umayya was an adopted son of Abd Shams so he was not a blood relative of Abd Manaf ibn Qusai. Umayya was later discarded from the noble family. Sunni historians disagree with this and view Shia claims as nothing more than outright polemics due to their hostility to the Umayyad family in general. They point to the fact that the grand sons of Uthman, Zaid bin amr bin uthman bin affan and Abdullah bin Amr bin Uthman got married to the Sukaina and Fatima the daughters of Hussein son of Ali to show closeness of Banu hashem and Bani Ummayah.
Who was the grandson of Zaid bin amr bin uthman bin affan?
A:
unanswerable