_:b57685452	<http://www.w3.org/ns/oa#hasSelector>	_:b57685453 .
_:b57685453	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b57685453	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57685452	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/67e7efbd1d4c301ca5e676c366dbaf31f3bf3949/1> .