_:b58058849 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b58058848 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/3848d1b2c5d0d6c2c8f873af30bb20a6e7cdab31/1> . _:b58058848 <http://www.w3.org/ns/oa#hasSelector> _:b58058849 . _:b58058849 <http://www.w3.org/ns/oa#exact> "chest congestion" .