_:b57678273 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57678272 <http://www.w3.org/ns/oa#hasSelector> _:b57678273 . _:b57678272 <http://www.w3.org/ns/oa#hasSource> <http://ns.inria.fr/covid19/arg/777328a5bc26d551df06e62b64682c03c25dde03/1> . _:b57678273 <http://www.w3.org/ns/oa#exact> "immunity" .