_:b57982261 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57982260 <http://www.w3.org/ns/oa#hasSelector> _:b57982261 . _:b57982261 <http://www.w3.org/ns/oa#exact> "changes" . _:b57982260 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/aa6ae5193e037bcdf4e6a5294762aa9d07c1ecda/2> .