_:b56425257	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56425257	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56425256	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2786687808083b1a23083be32dae8229ff545179/2> .
_:b56425256	<http://www.w3.org/ns/oa#hasSelector>	_:b56425257 .