<http://ns.inria.fr/covid19/PMC7131738#body_text>	<http://purl.org/dc/terms/subject>	"Treaties of North Macedonia" .
<http://ns.inria.fr/covid19/PMC7131738#body_text>	<http://purl.org/dc/terms/subject>	"Laboratories" .
<http://ns.inria.fr/covid19/PMC7131738#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .