What is the relationship between Casino Group and Jean-Charles Naouri 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.

Under CEO Jean-Charles Naouri everything has not always been seemless but the results are here: Casino Group are the number 1 retailer in Brazil, Colombia and Uruguay, with Argentina also being a huge market.

Answer: director_/_manager