_:b57319912	<http://www.w3.org/ns/oa#hasSelector>	_:b57319913 .
_:b57319913	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57319913	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b57319912	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/8378c06d20103401c6b53cdbaa8dd053bd602745/10> .