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.

Join the Nation's Conversation To find out more about Facebook commenting please read the Conversation Guidelines and FAQs Facebook showed tech IPOs are a zero-sum game (Investors always lose) John Shinal, Special for USA TODAY 4:51 p.m. EDT September 29, 2015 In this March 25, 2015 file photo, Mark Zuckerberg talks about the Messenger app during the Facebook F8 Developer Conference in San Francisco.

Answer: founded_by: Facebook, Mark Zuckerberg; creator: Facebook, Mark Zuckerberg