_:b57305964	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/844be100b06408734894f48a4db56a05ba260621/3> .
_:b57305965	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57305965	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b57305964	<http://www.w3.org/ns/oa#hasSelector>	_:b57305965 .