_:b56447248	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/d1db277897fb7857651d61fe895790b8a450eac8/1> .
_:b56447249	<http://www.w3.org/ns/oa#exact>	"concentrations" .
_:b56447249	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56447248	<http://www.w3.org/ns/oa#hasSelector>	_:b56447249 .