What is the relationship between Virgin Atlantic and Virgin Group 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.

In the Virgin Atlantic announcement day, they mentioned for their restructuring plan that they're doing this with the support of shareholders, Virgin Group and Delta, as well as some new investors.

Answer: parent_organization