_:b57145393	<http://www.w3.org/ns/oa#exact>	"urea nitrogen" .
_:b57145392	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2b2b1ce02feccccc3d52c627f5d4bde1d2951b5d/4> .
_:b57145392	<http://www.w3.org/ns/oa#hasSelector>	_:b57145393 .
_:b57145393	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .