<http://ns.inria.fr/covid19/PMC7309509#body_text>	<http://purl.org/dc/terms/subject>	"Gottfried Leibniz" .
<http://ns.inria.fr/covid19/PMC7309509#body_text>	<http://purl.org/dc/terms/subject>	"Logical consequence" .
<http://ns.inria.fr/covid19/PMC7309509#body_text>	<http://purl.org/dc/terms/subject>	"Sets of real numbers" .