<http://ns.inria.fr/covid19/PMC7123749#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7123749#body_text>	<http://purl.org/dc/terms/subject>	"Hiking equipment" .
<http://ns.inria.fr/covid19/PMC7123749#body_text>	<http://purl.org/dc/terms/subject>	"Populated places on Lake Ontario in Canada" .