_:b57494176	<http://www.w3.org/ns/oa#hasSelector>	_:b57494177 .
_:b57494177	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57494177	<http://www.w3.org/ns/oa#exact>	"concentrations" .
_:b57494176	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/bb2b48bb8a0572cc4cda4d229c253108737d60a9/0> .