Question: Raleigh–Durham International Airport, is the main airport serving Raleigh, Durham, and the surrounding Research Triangle region of North Carolina, the airport  is a crew base for which regional airline carrier, owned by Trans States Holdings and is headquartered in Bridgeton, Missouri?
Sentence (from "Raleigh–Durham International Airport"): The airport is a focus city for Delta Air Lines and is also a crew base for regional carriers Trans States Airlines and GoJet Airlines.
Relevant evidence: Yes