<http://ns.inria.fr/covid19/PMC6631891#title>	<http://purl.org/dc/terms/subject>	"Republics" .
<http://ns.inria.fr/covid19/PMC6631891#title>	<http://purl.org/dc/terms/subject>	"Countries in Europe" .
<http://ns.inria.fr/covid19/PMC6631891#title>	<http://purl.org/dc/terms/subject>	"Southern European countries" .