<http://ns.inria.fr/covid19/PMC7166792#body_text>	<http://purl.org/dc/terms/subject>	"Flora of North America" .
<http://ns.inria.fr/covid19/PMC7166792#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7166792#body_text>	<http://purl.org/dc/terms/subject>	"Historical regions" .