_:b57288756	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/bc0a05c990db51533968300c39609e1e90987e96/0> .
_:b57288757	<http://www.w3.org/ns/oa#exact>	"seroprevalence" .
_:b57288756	<http://www.w3.org/ns/oa#hasSelector>	_:b57288757 .
_:b57288757	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .