<http://ns.inria.fr/covid19/PMC6511161#body_text>	<http://purl.org/dc/terms/subject>	"Smallpox vaccines" .
<http://ns.inria.fr/covid19/PMC6511161#body_text>	<http://purl.org/dc/terms/subject>	"Civil defence organisations based in the United Kingdom" .
<http://ns.inria.fr/covid19/PMC6511161#body_text>	<http://purl.org/dc/terms/subject>	"Kamen Rider television series" .