_:b57139916	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/8c0849795cf319de1b8a9f6cd3ae24f042a8936b/1> .
_:b57139917	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57139917	<http://www.w3.org/ns/oa#exact>	"serum ferritin" .
_:b57139916	<http://www.w3.org/ns/oa#hasSelector>	_:b57139917 .