Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.

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.

Answer: operator: grocery, Walmart