_:b57274309 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/oa#TextQuoteSelector> . _:b57274309 <http://www.w3.org/ns/oa#exact> "BNP" . _:b57274309 <http://www.w3.org/ns/oa#exact> "brain natriuretic peptide" .