_:b57474516	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/4b3db1afbb09965a110dc0c987dbf0d482a1b765/0> .
_:b57474516	<http://www.w3.org/ns/oa#hasSelector>	_:b57474517 .
_:b57474517	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b57474517	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .