_:b57272052 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/3cd77c8a669eb83041406a138b1e2890861119f5/3> . _:b57272052 <http://www.w3.org/ns/oa#hasSelector> _:b57272053 . _:b57272053 <http://www.w3.org/ns/oa#exact> "clinical" . _:b57272053 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> .