_:b56959889 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b56959888 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/c3cca3d66fd6ef068573a246a76360a9e574cad1/0> . _:b56959889 <http://www.w3.org/ns/oa#exact> "levels" . _:b56959888 <http://www.w3.org/ns/oa#hasSelector> _:b56959889 .