<http://ns.inria.fr/covid19/PMC7119111#body_text>	<http://purl.org/dc/terms/subject>	"1934 establishments in Washington, D.C." .
<http://ns.inria.fr/covid19/PMC7119111#body_text>	<http://purl.org/dc/terms/subject>	"Trade unions" .
<http://ns.inria.fr/covid19/PMC7119111#body_text>	<http://purl.org/dc/terms/subject>	"Populated places on Lake Ontario in Canada" .