Question: Which construction company built the largest airport in the Upper Midwest region of Minnesota, Iowa, Nebraska, North Dakota, South Dakota, and Wisconsin?

Context paragraphs:
Charles A. West: Charles A. "Jack" West (c. 1890 – October 29, 1957) was an American football, Canadian football, and basketball coach and college athletics administrator.  He served as the head football coach at South Dakota State College of Agricultural and Mechanic Arts—now South Dakota State University—from 1919 to 1927 and at the University of North Dakota from 1928 to 1941 and again in 1945, compiling a career college football record of 134–55–14.  West was also the head basketball coach at South Dakota State from 1919 to 1926 and at North Dakota during the 1944–45 season, amassing a career college basketball record of 74–66.  He coached football teams to 11 North Central Conference titles, three at South Dakota State and eight at North Dakota.  In addition, he served as North Dakota's athletic director from 1928 to 1946.  West left the college ranks in 1946 to become head coach of the Winnipeg Blue Bombers, then of the Western Interprovincial Football Union, now a division of the Canadian Football League.  He died at the age of 67 on October 29, 1957 at his home in Grand Forks, North Dakota.

Ole and Lena: Ole and Lena (also Sven and Ole) are central characters in jokes by Scandinavian Americans, particularly in the Upper Midwest region of the U.S., particularly in Minnesota, Wisconsin, Iowa, South Dakota and North Dakota where Scandinavian immigrant traditions are common.

Central Defense Command: Central Defense Command (CDC) was a command formation of the United States Army during World War II.  The CDC was established on 17 March 1941, responsible for coordinating the defense of the Midwest region of the United States.  A second major responsibility of CDC was the training of soldiers prior to their deployment overseas.  The first Commanding General (CG) of CDC was Lieutenant General Ben Lear, who continued on in command of the U.S. Second Army.  CDC headquarters was co-located with the existing Second Army headquarters in Memphis.  CDC's operational region covered the states of Wyoming, Colorado, North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Iowa, Missouri, Wisconsin, Illinois, Indiana, Michigan, Ohio, Kentucky, Tennessee, and West Virginia.

Minneapolis–Saint Paul International Airport: Minneapolis–Saint Paul International Airport (IATA: MSP, ICAO: KMSP, FAA LID: MSP) , also known as Wold–Chamberlain Field, is a joint civil-military public use international airport.  Located in a portion of Hennepin County, Minnesota, United States, outside of any city or school district, within 10 miles (16 km) of both downtown Minneapolis and downtown Saint Paul, it is the largest and busiest airport in the six-state Upper Midwest region of Minnesota, Iowa, Nebraska, North Dakota, South Dakota, and Wisconsin.

Pizza Ranch: The Pizza Ranch, Inc., founded in 1981, is a "fast casual" restaurant chain.  Pizza Ranch offers pizza, chicken, a salad bar, and a pizza and chicken buffet.  Pizza Ranch has over 200 locations in Colorado, Illinois, Iowa, Kansas, Michigan, Minnesota, Missouri, Montana, Nebraska, North Dakota, South Dakota, Wisconsin, and Wyoming.  Pizza Ranch is the largest regional pizza franchise in Iowa, Minnesota, North Dakota, and South Dakota.

Minitex: Minitex is a publicly supported information and resource sharing program for academic, government, public and specialized libraries in the states of Minnesota, North Dakota, South Dakota, and Wisconsin.  It is a joint effort of the Minnesota State Office of Higher Education and the University of Minnesota Libraries.  Minitex is funded by the Minnesota State Legislature to serve higher education communities, and it also provides services for public, school, and specialized libraries in Minnesota through contracts with the Minnesota Department of Education.  Libraries in North Dakota and South Dakota participate in Minitex programs through contracts between the Minitex Office and the North and South Dakota State Libraries.  There is also reciprocity with Wisconsin libraries.

Minneapolis–St. Paul Airport Trams: The Minneapolis–St. Paul Airport Trams consist of a pair of cable-drawn automated people movers that serve travelers of the Minneapolis–Saint Paul International Airport.  Both were constructed by the Poma-Otis Transit Company of Farmington, Connecticut and are operated under the direction of the Metropolitan Airports Commission.

Dakota, Missouri Valley and Western Railroad: The Dakota, Missouri Valley and Western Railroad (reporting mark DMVW) started operations in September 1990 operating over 360 miles (580 km) of former Soo Line Railroad track in Montana and North Dakota.  The railroad operates approximately 523 miles (893 km) of track.  DMVW's network includes 435 mi of track leased from Canadian Pacific Railway, 13 mi of track from McKenzie, North Dakota, to Moffit, North Dakota, and 75 mi of track from Geneseo, North Dakota, to Aberdeen, South Dakota.  DMVW maintains its headquarters in Bismarck, North Dakota and has field offices in Crosby, North Dakota, Wishek, North Dakota, and Oakes, North Dakota, as well as Britton, South Dakota.

Prime Sports Upper Midwest: Prime Sports Upper Midwest is a defunct American regional sports network that was owned by Hubbard Broadcasting and Liberty Media, and operated as an affiliate of the Prime Network.  Headquartered in Minneapolis, Minnesota, the channel broadcast regional coverage of sports events throughout the Upper Midwest region.  Prime Sports Upper Midwest was available on cable providers throughout Iowa, Minnesota, North Dakota, South Dakota and Wisconsin.

Geography of Minnesota: Minnesota is the most northern state outside of Alaska; its isolated Northwest Angle in Lake of the Woods is the only part of the 48 contiguous states lying north of the 49th parallel.  Minnesota is in the U.S. region known as the Upper Midwest.  The state shares a Lake Superior water border with Michigan and Wisconsin on the northeast; the remainder of the eastern border is with Wisconsin.  Iowa is to the south, North Dakota and South Dakota are west, and the Canadian provinces of Ontario and Manitoba are north.  With 87,014 sqmi , or approximately 2.26

Supporting paragraphs: Minneapolis–St. Paul Airport Trams Minneapolis–Saint Paul International Airport
Answer: Poma-Otis Transit Company of Farmington, Connecticut