_:b56415056	<http://www.w3.org/ns/oa#hasSelector>	_:b56415057 .
_:b56415057	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56415057	<http://www.w3.org/ns/oa#exact>	"concentration" .
_:b56415056	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/4b76ab46e8f00ac910b6ac39a8d7d4ca7b75564f/4> .