What is the relationship between grocery and Walmart in the context of the input sentence. Choose an answer from: 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.

About 90%, 95% of the products grown by the farmers who lease our farms are sold to grocery stores like Kroger, Safeway, Costco Walmart and similar outlets, very little of the produce is being sold to the food service industry including restaurants and institutions like schools.

Answer: operator