Utilize the input text as a context reference, choose the right relationship between Albertsons and Supervalu 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.

In 2013, the consortium acquired 900 stores from Supervalu , which included the Albertsons stores that were not acquired in the 2006 deal.

Answer: parent_organization