<http://ns.inria.fr/covid19/PMC7094674#body_text>	<http://purl.org/dc/terms/subject>	"English letter writers" .
<http://ns.inria.fr/covid19/PMC7094674#body_text>	<http://purl.org/dc/terms/subject>	"Sanofi" .
<http://ns.inria.fr/covid19/PMC7094674#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .