_:b57111976 <http://www.w3.org/ns/oa#hasSelector> _:b57111977 . _:b57111976 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/ab70ed497469460f2ec13fcfe51611005fab867a/1> . _:b57111977 <http://www.w3.org/ns/oa#exact> "B" . _:b57111977 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> .