<http://ns.inria.fr/covid19/PMC3516559#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .
<http://ns.inria.fr/covid19/PMC3516559#body_text>	<http://purl.org/dc/terms/subject>	"Cars introduced in 1932" .
<http://ns.inria.fr/covid19/PMC3516559#body_text>	<http://purl.org/dc/terms/subject>	"Indoles" .