_:b56476988	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2ac1d61412cb34efcafd43308bf6a05ddfe5c81d/1> .
_:b56476989	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56476988	<http://www.w3.org/ns/oa#hasSelector>	_:b56476989 .
_:b56476989	<http://www.w3.org/ns/oa#exact>	"concentration" .