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Just to clarify, my recommended format is not exactly Option 1, but it is close. They need to be sure to encase each individual 'affiliation/example' within it's own set of quotation marks, not just separated by a comma. Without doing so, search engines will see all the affiliations as a single entity rather than individual affiliations. Also, be sure to include all 'affiliations/examples' within brackets [ ] See how Moz's set up their 'sameAs' schema? This is the format that should be followed.