_:b56438509	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56438508	<http://www.w3.org/ns/oa#hasSelector>	_:b56438509 .
_:b56438509	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56438508	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/3fb5347de9ccf173fea6f68d8a26266464039ff6/3> .