Question: Republic Airways Holdings, Inc. is an American airline holding corporation based in Indianapolis, Indiana, that owns which regional airline subsidiary of Republic Airways Holdings that operates service as American Eagle, Delta Connection, and United Express using a fleet of Embraer 170 and Embraer 175 regional jets?
Sentence (from "SkyWest Airlines"): The airline serves as a feeder airline, operating under contract with various major carriers.
Relevant evidence: No