_:b57931049	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57931048	<http://www.w3.org/ns/oa#hasSelector>	_:b57931049 .
_:b57931048	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/580ef02f408295bba21f0ad87b6eba6ba9676163/0> .
_:b57931049	<http://www.w3.org/ns/oa#exact>	"frequency" .