<http://webisa.webdatacommons.org/prov/475451524> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/233054113> . <http://webisa.webdatacommons.org/233054113> <http://www.w3.org/ns/prov#wasQuotedFrom> <aviationtoday.com> . <http://webisa.webdatacommons.org/233054113> <http://www.w3.org/ns/prov#value> "There is no such thing as a gliding helicopter." . <http://webisa.webdatacommons.org/233054113> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .