_:b56800372	<http://www.w3.org/ns/oa#hasSelector>	_:b56800373 .
_:b56800373	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56800372	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/f14e130e218efe8b290d97f47eafb3ebc5318379/1> .
_:b56800373	<http://www.w3.org/ns/oa#exact>	"grade" .