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 "MidAtlantic Airways"): It was a subsidiary of US Airways and operated the Embraer 170 medium-jet aircraft as a US Airways Express carrier.
Relevant evidence: No