<http://ns.inria.fr/covid19/PMC7125827#body_text> <http://purl.org/dc/terms/subject> "Differential equations" . <http://ns.inria.fr/covid19/PMC7125827#body_text> <http://purl.org/dc/terms/subject> "Physical chemistry" . <http://ns.inria.fr/covid19/PMC7125827#body_text> <http://purl.org/dc/terms/subject> "Philosophical theories" .