_:b57539568	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/0b2635ace26bac849bb9659fe89b9dce6bffb2a6/6> .
_:b57539569	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57539568	<http://www.w3.org/ns/oa#hasSelector>	_:b57539569 .
_:b57539569	<http://www.w3.org/ns/oa#exact>	"concentrations" .