_:b56750509 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b56750508 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/b811c5d5a4ab96d0c26d61514b4af37fe76f9209/0> . _:b56750509 <http://www.w3.org/ns/oa#exact> "packed cell volume" . _:b56750508 <http://www.w3.org/ns/oa#hasSelector> _:b56750509 .