_:b57484521 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57484521 <http://www.w3.org/ns/oa#exact> "Changes" . _:b57484520 <http://www.w3.org/ns/oa#hasSelector> _:b57484521 . _:b57484520 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/ee721163e2db440749961010287cdf61de7bf301/1> .