Refer to the input text as context and select the correct relationship between 'Goldman Sachs' and 'Lloyd Blankfein' from the available options.
Options: publisher, legal form, chief executive officer, member of

In a memo signed “Lloyd,” Goldman Sachs CEO Lloyd Blankfein revealed he’s been diagnosed with lymphoma but added that it had been determined to be a “highly curable” type of the cancerous disease.
chief executive officer