_:b57970844 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/e365450800b8ba443821448827600480868e6295/2> . _:b57970844 <http://www.w3.org/ns/oa#hasSelector> _:b57970845 . _:b57970845 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57970845 <http://www.w3.org/ns/oa#exact> "hospitalization" .