<http://ns.inria.fr/covid19/PMC7326423#body_text>	<http://purl.org/dc/terms/subject>	"Cannabis law in the United States" .
<http://ns.inria.fr/covid19/PMC7326423#body_text>	<http://purl.org/dc/terms/subject>	"Clinical research" .
<http://ns.inria.fr/covid19/PMC7326423#body_text>	<http://purl.org/dc/terms/subject>	"Self-harm" .