_:b57413937	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57413936	<http://www.w3.org/ns/oa#hasSelector>	_:b57413937 .
_:b57413936	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/d00a0e49339e14493cb55796ee8eb47bebcb4273/4> .
_:b57413937	<http://www.w3.org/ns/oa#exact>	"frequency" .