<http://ns.inria.fr/covid19/PMC7162034#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7162034#body_text>	<http://purl.org/dc/terms/subject>	"Petrochemicals" .
<http://ns.inria.fr/covid19/PMC7162034#body_text>	<http://purl.org/dc/terms/subject>	"Nitrogen(\u22123) compounds" .