_:b56528541	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56528541	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56528540	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/704eebd9653b61d2dfbe1483d1a616e6836eeec8/1> .
_:b56528540	<http://www.w3.org/ns/oa#hasSelector>	_:b56528541 .