_:b57016673	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57016672	<http://www.w3.org/ns/oa#hasSelector>	_:b57016673 .
_:b57016673	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b57016672	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/0472e6f8963dae5aadf9a46fb19512cabb5f796e/2> .