<http://ns.inria.fr/covid19/PMC7121797#body_text>	<http://purl.org/dc/terms/subject>	"June observances" .
<http://ns.inria.fr/covid19/PMC7121797#body_text>	<http://purl.org/dc/terms/subject>	"1917 disestablishments in Italy" .
<http://ns.inria.fr/covid19/PMC7121797#body_text>	<http://purl.org/dc/terms/subject>	"May observances" .