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.

How JPMorgan boss Jamie Dimon bucked convention to become a billionaire Life is getting better for middle-class households despite mounting income inequality, thanks to improvements in technology and cars, according to JPMorgan Chase chief executive officer Jamie Dimon.

Answer: employer: Jamie Dimon, JPMorgan Chase; position_held: Jamie Dimon, chief executive officer