_:b57548648 <http://www.w3.org/ns/oa#hasSelector> _:b57548649 . _:b57548649 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57548648 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/f9e25b3fb07c1338b5a21c36014e295ab14ca736/0> . _:b57548649 <http://www.w3.org/ns/oa#exact> "CSF" .