_:b57132825 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57132825 <http://www.w3.org/ns/oa#exact> "symptoms" . _:b57132824 <http://www.w3.org/ns/oa#hasSelector> _:b57132825 . _:b57132824 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/756f5faaa9c197d175d05ade8be6c254a9c622af/1> .