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.

PayPal CEO Dan Schulman and employees rung in the opening bell on the Nasdaq while the company gave out food via food trucks in Times Square and posted passersby's photos on Nadsaq's seven-story digital billboard to commemorate the listing.

Answer: stock_exchange: PayPal, Nasdaq