_:b56421136	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/0660410a2fa4143612e208965cc3f17368aee493/0> .
_:b56421136	<http://www.w3.org/ns/oa#hasSelector>	_:b56421137 .
_:b56421137	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56421137	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .