_:b56521472	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/b121a4b1dc6d8e513631edeb11421f20aad79106/3> .
_:b56521473	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56521472	<http://www.w3.org/ns/oa#hasSelector>	_:b56521473 .
_:b56521473	<http://www.w3.org/ns/oa#exact>	"concentration" .