_:b56612952 <http://www.w3.org/ns/oa#hasSelector> _:b56612953 . _:b56612953 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b56612953 <http://www.w3.org/ns/oa#exact> "OS" . _:b56612952 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/b4c410c8b776f2bee7b094c4302139f8b12ed7e5/3> .