Utilize the input text as a context reference, choose the right relationship between Russell Investments and London Stock Exchange Group 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.

July 9 (Reuters) - China's CITIC Group Corporation is in negotiations to acquire Russell Investments from London Stock Exchange Group Plc in what is expected to be a roughly $1.8 billion deal, according to people familiar with the matter.

Answer: parent_organization