_:b56774581	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56774580	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/bf379c056592b1984fda1218c3d2fe1ac6f4a6a0/1> .
_:b56774580	<http://www.w3.org/ns/oa#hasSelector>	_:b56774581 .
_:b56774581	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .