<http://ns.inria.fr/covid19/PMC7115400#body_text>	<http://purl.org/dc/terms/subject>	"Anti-communism in Vietnam" .
<http://ns.inria.fr/covid19/PMC7115400#body_text>	<http://purl.org/dc/terms/subject>	"Maritime boundaries" .
<http://ns.inria.fr/covid19/PMC7115400#body_text>	<http://purl.org/dc/terms/subject>	"Quadrennial sporting events" .