<http://ns.inria.fr/covid19/PMC7292939#body_text>	<http://purl.org/dc/terms/subject>	"December 1991 events in Europe" .
<http://ns.inria.fr/covid19/PMC7292939#body_text>	<http://purl.org/dc/terms/subject>	"Tourist attractions in Moscow" .
<http://ns.inria.fr/covid19/PMC7292939#body_text>	<http://purl.org/dc/terms/subject>	"Baltic region" .