_:b56794656 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/f30d0a1f29fc453bf2b6e0382240137092ac4deb/0> . _:b56794656 <http://www.w3.org/ns/oa#hasSelector> _:b56794657 . _:b56794657 <http://www.w3.org/ns/oa#exact> "positive" . _:b56794657 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> .