<http://ns.inria.fr/covid19/PMC3439446#title>	<http://purl.org/dc/terms/subject>	"Viral respiratory tract infections" .
<http://ns.inria.fr/covid19/PMC3439446#title>	<http://purl.org/dc/terms/subject>	"Prefectures of the Ming dynasty" .
<http://ns.inria.fr/covid19/PMC3439446#title>	<http://purl.org/dc/terms/subject>	"Metropolitan areas of China" .
<http://ns.inria.fr/covid19/PMC3439446#title>	<http://purl.org/dc/terms/subject>	"BRICS nations" .