<http://ns.inria.fr/covid19/PMC7107565#title>	<http://purl.org/dc/terms/subject>	"Foreign relations of the Soviet Union" .
<http://ns.inria.fr/covid19/PMC7107565#title>	<http://purl.org/dc/terms/subject>	"Quarantine facilities" .
<http://ns.inria.fr/covid19/PMC7107565#title>	<http://purl.org/dc/terms/subject>	"Treaties concluded in 1966" .