<http://ns.inria.fr/covid19/PMC7304691#body_text>	<http://purl.org/dc/terms/subject>	"Drawing" .
<http://ns.inria.fr/covid19/PMC7304691#body_text>	<http://purl.org/dc/terms/subject>	"Digital geometry" .
<http://ns.inria.fr/covid19/PMC7304691#body_text>	<http://purl.org/dc/terms/subject>	"Patent law" .
<http://ns.inria.fr/covid19/PMC7304691#body_text>	<http://purl.org/dc/terms/subject>	"Liao dynasty" .