_:b56928500	<http://www.w3.org/ns/oa#hasSelector>	_:b56928501 .
_:b56928501	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56928501	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b56928500	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/b9a0e99f8f22da1d10998ac9e63a8b322baf1d69/1> .