<http://ns.inria.fr/covid19/PMC3198886#title>	<http://purl.org/dc/terms/subject>	"Metropolitan areas of China" .
<http://ns.inria.fr/covid19/PMC3198886#title>	<http://purl.org/dc/terms/subject>	"Primary care" .
<http://ns.inria.fr/covid19/PMC3198886#title>	<http://purl.org/dc/terms/subject>	"BRICS nations" .