What is the relationship between Goldman Sachs and Lloyd Blankfein 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.

Goldman Sachs Inc. Chief Executive Lloyd Blankfein said he is suffering from a curable form of blood cancer, raising anew the sensitive issue of who may one day replace him.

Answer: chief_executive_officer