<http://ns.inria.fr/covid19/PMC6298441#body_text>	<http://purl.org/dc/terms/subject>	"Commercial-free television networks" .
<http://ns.inria.fr/covid19/PMC6298441#body_text>	<http://purl.org/dc/terms/subject>	"Automatic identification and data capture" .
<http://ns.inria.fr/covid19/PMC6298441#body_text>	<http://purl.org/dc/terms/subject>	"Historical regions" .