Utilize the input text as a context reference, choose the right relationship between Shuttle America and Republic Airways Holdings from the options. Options: 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