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.

Two years ago, SmartCentres supported Walmart Canada's test and rollout of grocery pickup in its stores at our properties and introduced co-branded Walmart Canada Penguin Pick-Up locations to help expand their reach into areas of Downtown, Toronto and Montreal, where access to their grocery offering is limited.

Answer: operator