_:b57443132 <http://www.w3.org/ns/oa#hasSelector> _:b57443133 . _:b57443133 <http://www.w3.org/ns/oa#exact> "Serum" . _:b57443133 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57443132 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/2b04b10ec726a21e87e9fdc4eb91e804ff12517b/2> .