About: http://webisa.webdatacommons.org/189015039

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	Cost is a very difficult thing to estimate in early stages of development of a space program.
http://www.w3.org/ns/prov#wasQuotedFrom	frednet.com