_:b57563417	<http://www.w3.org/ns/oa#exact>	"periods" .
_:b57563417	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57563417	<http://www.w3.org/ns/oa#exact>	"period" .
_:b57563416	<http://www.w3.org/ns/oa#hasSelector>	_:b57563417 .
_:b57563416	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2aec20c10785448b3d01e9de635004cb61d89b46/0> .