Question: Kansas City Live Stock Exchange was the HQ of a yard which closed when?
Related documents: [0]  [DOC] The Kansas City Stockyards in the West Bottoms west of downtown Kansas City, Missouri flourished from 1871 until closing in 1991. [END] 
[1]  [DOC] The Kansas City Live Stock Exchange was the headquarters of the Kansas City Stockyards. It is located at 1600 Gennesse in Kansas City, Missouri, in the West Bottoms. The building is listed on the National Register of Historic Places. [END] 
Answer: 
1991
1991