_:b57076636	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/4f4a8752a2ef596860d90ef31a71f2f63c2dc94a/0> .
_:b57076637	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57076637	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b57076636	<http://www.w3.org/ns/oa#hasSelector>	_:b57076637 .