_:b57645121	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57645121	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b57645120	<http://www.w3.org/ns/oa#hasSelector>	_:b57645121 .
_:b57645120	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/4f292b626af0f6632fc307e56a378ccc52eabd8c/2> .