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.
Text: Walmart is also testing an online grocery service in five cities — San Jose, Calif., Denver, Bentonville, Ark., Phoenix and Huntsville, Ala. Customers can order groceries online, then schedule a pick-up time.
user
operator
assistant