<http://ns.inria.fr/covid19/PMC4634267#title>	<http://purl.org/dc/terms/subject>	"Southeastern European countries" .
<http://ns.inria.fr/covid19/PMC4634267#title>	<http://purl.org/dc/terms/subject>	"Southern European countries" .
<http://ns.inria.fr/covid19/PMC4634267#title>	<http://purl.org/dc/terms/subject>	"States and territories established in 1991" .