_:b57429089 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57429089 <http://www.w3.org/ns/oa#exact> "mortality" . _:b57429088 <http://www.w3.org/ns/oa#hasSelector> _:b57429089 . _:b57429088 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/0631f5f31d10462e15e069424b00bdfd0632a549/0> .