_:b57245752	<http://www.w3.org/ns/oa#hasSelector>	_:b57245753 .
_:b57245753	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57245753	<http://www.w3.org/ns/oa#exact>	"levels" .
_:b57245752	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/296a164caf341b41f229d0c618959a6bfeb6a00c/0> .