_:b57715608 <http://www.w3.org/ns/oa#hasSelector> _:b57715609 . _:b57715608 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/213fdedff656134ff3dbe24a7d7bbba61d13baa1/1> . _:b57715609 <http://www.w3.org/ns/oa#exact> "viral burden" . _:b57715609 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> .