_:b56452172	<http://www.w3.org/ns/oa#hasSelector>	_:b56452173 .
_:b56452173	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56452173	<http://www.w3.org/ns/oa#exact>	"frequency" .
_:b56452172	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/e3484d1c91b379821c1f8d99cf80d87a21d151ed/2> .