_:b56452048	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/9832e99b5e9cf68d174c2d2f53f87e1ba054c971/2> .
_:b56452048	<http://www.w3.org/ns/oa#hasSelector>	_:b56452049 .
_:b56452049	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56452049	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .