<http://ns.inria.fr/covid19/PMC7102131#body_text>	<http://purl.org/dc/terms/subject>	"1979 establishments in West Germany" .
<http://ns.inria.fr/covid19/PMC7102131#body_text>	<http://purl.org/dc/terms/subject>	"Chemical pathology" .
<http://ns.inria.fr/covid19/PMC7102131#body_text>	<http://purl.org/dc/terms/subject>	"Waterways in Poland" .