What is the relationship between Shuttle America and Republic Airways Holdings in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Republic Airways Holdings —parent of Republic Airlines and Shuttle America —posted second-quarter net income of $4.3 million, down 78.6% from a net profit of $20.1 million in the year-ago period.

Answer: parent_organization