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"): 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.
Relevant evidence: No