<http://ns.inria.fr/covid19/PMC7122118#body_text>	<http://purl.org/dc/terms/subject>	"Physical chemistry" .
<http://ns.inria.fr/covid19/PMC7122118#body_text>	<http://purl.org/dc/terms/subject>	"1834 in science" .
<http://ns.inria.fr/covid19/PMC7122118#body_text>	<http://purl.org/dc/terms/subject>	"American World War II propaganda films" .