_:b57780264	<http://www.w3.org/ns/oa#hasSelector>	_:b57780265 .
_:b57780265	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b57780264	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/bdde12397b23a71a93e121e5906bdfd2a01b46ef/0> .
_:b57780265	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .