<http://ns.inria.fr/covid19/PMC7448964#body_text>	<http://purl.org/dc/terms/subject>	"12th-century establishments in Switzerland" .
<http://ns.inria.fr/covid19/PMC7448964#body_text>	<http://purl.org/dc/terms/subject>	"Early psychosis" .
<http://ns.inria.fr/covid19/PMC7448964#body_text>	<http://purl.org/dc/terms/subject>	"Trade unions" .