<http://ns.inria.fr/covid19/PMC7367677#title>	<http://purl.org/dc/terms/subject>	"Metropolitan areas of Australia" .
<http://ns.inria.fr/covid19/PMC7367677#title>	<http://purl.org/dc/terms/subject>	"COVID-19" .
<http://ns.inria.fr/covid19/PMC7367677#title>	<http://purl.org/dc/terms/subject>	"G20 nations" .