Question: Piedmont Triad International Airport and Aniak Airport, are located in which country?
Sentence (from "Piedmont Triad International Airport"): Piedmont Triad International Airport (IATA: GSO, ICAO: KGSO, FAA LID: GSO) (commonly referred to as "PTI") is an airport located in the center of North Carolina just west of Greensboro, serving Greensboro, High Point and Winston-Salem as well as the entire Piedmont Triad region in North Carolina.
Relevant evidence: Yes