Take context from the input text and decide on the accurate relationship between 'Goldman Sachs' and 'Lloyd Blankfein' from the options provided.
Options: chief executive officer, brand, distributed by, position held

(Reuters) - Goldman Sachs Group Inc Chief Executive Officer Lloyd Blankfein said on Tuesday he had a "highly curable" form of lymphoma, and would be able to work substantially as normal during treatment.
chief executive officer