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.
Text: Reddit Email Print Reprint NEW YORK ( TheStreet ) --  Walmart ( WMT - Get Report ) stock is increasing by 0.42% to $63.93 in mid-morning trading on Tuesday, after the company announced it will expand a service that allows customers to pick up their online grocery orders from store parking lots.
user
operator
assistant