_:b57510909 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57510908 <http://www.w3.org/ns/oa#hasSelector> _:b57510909 . _:b57510909 <http://www.w3.org/ns/oa#exact> "factor" . _:b57510908 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/9832e99b5e9cf68d174c2d2f53f87e1ba054c971/2> .