_:b56618672	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/a4f5f3ffbe3985a640adcf7da121cced5a6c6f60/2> .
_:b56618673	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56618672	<http://www.w3.org/ns/oa#hasSelector>	_:b56618673 .
_:b56618673	<http://www.w3.org/ns/oa#exact>	"concentration" .