_:b56634060	<http://www.w3.org/ns/oa#hasSelector>	_:b56634061 .
_:b56634061	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56634061	<http://www.w3.org/ns/oa#exact>	"grade 3" .
_:b56634060	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/a7d859a4944c022de8ce9a9f74ef7affc6d3d80c/4> .