<http://ns.inria.fr/covid19/PMC7429626#body_text>	<http://purl.org/dc/terms/subject>	"Social groups" .
<http://ns.inria.fr/covid19/PMC7429626#body_text>	<http://purl.org/dc/terms/subject>	"Sleep disorders" .
<http://ns.inria.fr/covid19/PMC7429626#body_text>	<http://purl.org/dc/terms/subject>	"Clinical research" .
<http://ns.inria.fr/covid19/PMC7429626#body_text>	<http://purl.org/dc/terms/subject>	"Human activities with impact on the environment" .