About: http://webisa.webdatacommons.org/182343228

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, because the valves were mechanical devices, it was possible that there might be a defect or failure in them, but no testimony appears to show that this possibility was a likely one.
http://www.w3.org/ns/prov#wasQuotedFrom	airships.net