_:b57996644	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/1aa3d8e4824c9ea70928487e62c7b1e16111d425/19> .
_:b57996645	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57996644	<http://www.w3.org/ns/oa#hasSelector>	_:b57996645 .
_:b57996645	<http://www.w3.org/ns/oa#exact>	"concentrations" .