<http://ns.inria.fr/covid19/PMC7267120#body_text> <http://purl.org/dc/terms/subject> "April observances" . <http://ns.inria.fr/covid19/PMC7267120#body_text> <http://purl.org/dc/terms/subject> "Primary care" . <http://ns.inria.fr/covid19/PMC7267120#body_text> <http://purl.org/dc/terms/subject> "Jewish classical musicians" .