<http://ns.inria.fr/covid19/PMC7282873#body_text> <http://purl.org/dc/terms/subject> "American companies established in 1939" . <http://ns.inria.fr/covid19/PMC7282873#body_text> <http://purl.org/dc/terms/subject> "Technology companies based in the San Francisco Bay Area" . <http://ns.inria.fr/covid19/PMC7282873#body_text> <http://purl.org/dc/terms/subject> "Multinational companies headquartered in the United States" .