<http://ns.inria.fr/covid19/PMC6151073#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .
<http://ns.inria.fr/covid19/PMC6151073#body_text>	<http://purl.org/dc/terms/subject>	"Chemical pathology" .
<http://ns.inria.fr/covid19/PMC6151073#body_text>	<http://purl.org/dc/terms/subject>	"Populated coastal places in California" .