_:b57183025 <http://www.w3.org/ns/oa#exact> "frequencies" . _:b57183025 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57183024 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/0951f5ec3710990a5c181e04fa8fdf7d9a0376e5/0> . _:b57183024 <http://www.w3.org/ns/oa#hasSelector> _:b57183025 .