<http://ns.inria.fr/covid19/PMC7134935#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7134935#body_text>	<http://purl.org/dc/terms/subject>	"Hiking equipment" .
<http://ns.inria.fr/covid19/PMC7134935#body_text>	<http://purl.org/dc/terms/subject>	"Treaties of North Macedonia" .