<http://ns.inria.fr/covid19/PMC5831680#body_text>	<http://purl.org/dc/terms/subject>	"1789 establishments in the United States" .
<http://ns.inria.fr/covid19/PMC5831680#body_text>	<http://purl.org/dc/terms/subject>	"Northeast Asia" .
<http://ns.inria.fr/covid19/PMC5831680#body_text>	<http://purl.org/dc/terms/subject>	"Portable computers" .