_:b57766620	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/780af299e0104f02f9520a10a3480e7d7629af38/2> .
_:b57766621	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57766620	<http://www.w3.org/ns/oa#hasSelector>	_:b57766621 .
_:b57766621	<http://www.w3.org/ns/oa#exact>	"positive predictive value" .