<http://ns.inria.fr/covid19/PMC7126579#body_text>	<http://purl.org/dc/terms/subject>	"Trade unions" .
<http://ns.inria.fr/covid19/PMC7126579#body_text>	<http://purl.org/dc/terms/subject>	"Primary care" .
<http://ns.inria.fr/covid19/PMC7126579#body_text>	<http://purl.org/dc/terms/subject>	"Louisiana parishes on the Mississippi River" .