Utilize the input text as a context reference, choose the right relationship between grocery and Walmart 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.

A&P bankruptcy: Part 2 Not too long ago the biggest retailer in the country was not Walmart ( WMT ), but The Great Atlantic and Pacific Tea Company -- better known as the grocery store chain A&P.

Answer: operator