[Q]: Nicotiana langsdorffii, Langsdorff's tobacco, is a species of the "Nicotiana" genus (tobacco). It is an annual plant with large leaves (up to 10 inches long) with tall 2 inch nodding long tubular bell shaped flowers that are apple green in colour, with blue anthers. "N. langsdorfii" lacks fragrance unlike some of the other tall species. It is grown as an ornamental garden plant. Langsdorff's tobacco is a not a popular green plant
[A]: It's impossible to say

[Q]: Keystone is an unincorporated community and census-designated place in central Keith County, Nebraska, United States. It lies along local roads near the North Platte River, northeast of the city of Ogallala, the county seat of Keith County. Its elevation is 3,100feet (945m). Although Keystone is unincorporated, it has a post office, with the ZIP code of 69144. Ogallala is not within Nebraska.
[A]: No

[Q]: Vasili Vyacheslavovich Blagov (Russian: ; born October 29, 1954 in Moscow) is a Russian pair skater who competed for the Soviet Union. With partner Irina Cherniaeva, he represented the Soviet Union at the 1972 Winter Olympics where they placed 6th. Vasili Vyacheslavovich Blagov has no legs.
[A]: No

[Q]: Datong () is a prefecture-level city in northern Shanxi province, People's Republic of China, located in a basin at an elevation of 1040 m and bordering Inner Mongolia to the north and west and Hebei to the east. It had a population of 3,318,057 at the 2010 census of whom 1,629,035 lived in the built up area made of 3 out of 4 urban districts, namely Chengqu, Kuangqu and Nanjiao District. kuangqu is the largest district
[A]:
It's impossible to say