<http://ns.inria.fr/covid19/PMC7091695#title>	<http://purl.org/dc/terms/subject>	"Bird diseases" .
<http://ns.inria.fr/covid19/PMC7091695#title>	<http://purl.org/dc/terms/subject>	"Ophthalmology" .
<http://ns.inria.fr/covid19/PMC7091695#title>	<http://purl.org/dc/terms/subject>	"Metropolitan areas of China" .