<http://ns.inria.fr/covid19/PMC6624944#body_text>	<http://purl.org/dc/terms/subject>	"Rivers of Mexico" .
<http://ns.inria.fr/covid19/PMC6624944#body_text>	<http://purl.org/dc/terms/subject>	"Bahia" .
<http://ns.inria.fr/covid19/PMC6624944#body_text>	<http://purl.org/dc/terms/subject>	"Differential equations" .