<http://ns.inria.fr/covid19/PMC3061939#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .
<http://ns.inria.fr/covid19/PMC3061939#body_text>	<http://purl.org/dc/terms/subject>	"Electronics companies established in 1956" .
<http://ns.inria.fr/covid19/PMC3061939#body_text>	<http://purl.org/dc/terms/subject>	"Kidney" .