Question: Which construction company built the largest airport in the Upper Midwest region of Minnesota, Iowa, Nebraska, North Dakota, South Dakota, and Wisconsin?
Sentence (from "Minneapolis–Saint Paul 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.
Relevant evidence: Yes