Utilize the input text as a context reference, choose the right relationship between Goldman Sachs and Lloyd Blankfein from the options. Options: 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.

(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