<http://ns.inria.fr/covid19/PMC5155296#body_text>	<http://purl.org/dc/terms/subject>	"Commercial-free television networks" .
<http://ns.inria.fr/covid19/PMC5155296#body_text>	<http://purl.org/dc/terms/subject>	"1640 establishments in Sweden" .
<http://ns.inria.fr/covid19/PMC5155296#body_text>	<http://purl.org/dc/terms/subject>	"Electronics companies established in 1956" .