_:b57723420	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/defb2baddf8a312718647fac6a0860606ff8907d/1> .
_:b57723420	<http://www.w3.org/ns/oa#hasSelector>	_:b57723421 .
_:b57723421	<http://www.w3.org/ns/oa#exact>	"level" .
_:b57723421	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .