_:b56915160	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/caf2d8ef6c1970e596f3f14ae6c4b43a26bba2c5/2> .
_:b56915160	<http://www.w3.org/ns/oa#hasSelector>	_:b56915161 .
_:b56915161	<http://www.w3.org/ns/oa#exact>	"hospital length of stay" .
_:b56915161	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .