About: http://webisa.webdatacommons.org/428470189

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	Both plans were risky in the early 1960's when spacecraft had never mated in orbit, especially near the Moon.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com