_:b56647388	<http://www.w3.org/ns/oa#hasSelector>	_:b56647389 .
_:b56647389	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56647388	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/b15fc73634ebc04b1d96b6014156a114bac55879/19> .
_:b56647389	<http://www.w3.org/ns/oa#exact>	"frequency" .