<http://ns.inria.fr/covid19/PMC7127781#body_text>	<http://purl.org/dc/terms/subject>	"Schools in Santiago Metropolitan Region" .
<http://ns.inria.fr/covid19/PMC7127781#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7127781#body_text>	<http://purl.org/dc/terms/subject>	"History of Manchuria" .