About: http://webisa.webdatacommons.org/312187139

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	I took the failures of Delta 4 Heavy, the Volna rocket and others as examples of members of a much larger and wider family of rockets, engines etc. only the most member of which have not been developed yet.
http://www.w3.org/ns/prov#wasQuotedFrom	spacefellowship.com