Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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: owner_of: Virgin Group, Virgin Atlantic; parent_organization: Virgin Atlantic, Virgin Group; subsidiary: Virgin Group, Virgin Atlantic; owned_by: Virgin Atlantic, Virgin Group