<http://ns.inria.fr/covid19/PMC4118806#body_text>	<http://purl.org/dc/terms/subject>	"Excitatory amino acid receptor ligands" .
<http://ns.inria.fr/covid19/PMC4118806#body_text>	<http://purl.org/dc/terms/subject>	"Commercial-free television networks" .
<http://ns.inria.fr/covid19/PMC4118806#body_text>	<http://purl.org/dc/terms/subject>	"1989 establishments in California" .