<http://ns.inria.fr/covid19/PMC7102652#body_text>	<http://purl.org/dc/terms/subject>	"Graphene" .
<http://ns.inria.fr/covid19/PMC7102652#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7102652#body_text>	<http://purl.org/dc/terms/subject>	"British inventors" .
<http://ns.inria.fr/covid19/PMC7102652#body_text>	<http://purl.org/dc/terms/subject>	"Knights Bachelor" .