_:b57989461	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57989461	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b57989460	<http://www.w3.org/ns/oa#hasSelector>	_:b57989461 .
_:b57989460	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/381bb3c674e68a97e38efe5d6f9952c7a64522d3/1> .