<http://ns.inria.fr/covid19/PMC6889449#title>	<http://purl.org/dc/terms/subject>	"Risk" .
<http://ns.inria.fr/covid19/PMC6889449#title>	<http://purl.org/dc/terms/subject>	"Regions of Europe" .
<http://ns.inria.fr/covid19/PMC6889449#title>	<http://purl.org/dc/terms/subject>	"G7 nations" .