_:b57963677	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57963676	<http://www.w3.org/ns/oa#hasSelector>	_:b57963677 .
_:b57963677	<http://www.w3.org/ns/oa#exact>	"concentrations" .
_:b57963676	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/c4f1924395fe010018f7e83f71f5a0ba744dcf2e/4> .