Question: Aniak Airport and Valdosta Regional Airport, are which type of airport?
Sentence (from "Roanoke–Blacksburg Regional Airport"): Roanoke–Blacksburg Regional Airport (IATA: ROA, ICAO: KROA, FAA LID: ROA) , also known as Woodrum Field, is a regional airport located three nautical miles (6 km) northwest of the central business district of Roanoke, a city in Roanoke County, Virginia, United States.
Relevant evidence: No