_:b57821828 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/12f59e88597b670bd77cb9b75efcb2eebf8f1ad8/6> . _:b57821829 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57821829 <http://www.w3.org/ns/oa#exact> "survival" . _:b57821828 <http://www.w3.org/ns/oa#hasSelector> _:b57821829 .