_:b57608872	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/319a654d23d67049bcbcbb2ace7f0a9acbc02887/1> .
_:b57608872	<http://www.w3.org/ns/oa#hasSelector>	_:b57608873 .
_:b57608873	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57608873	<http://www.w3.org/ns/oa#exact>	"gradient" .