_:b56227424 <http://www.w3.org/ns/oa#hasSelector> _:b56227425 . _:b56227424 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/1049562c838f202553d43127e68abe8a2f9d8fea/3> . _:b56227425 <http://www.w3.org/ns/oa#exact> "p21" . _:b56227425 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> .