About: http://webisa.webdatacommons.org/183412576

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	Some of these ideas such as the space elevator, and rotovator, require new materials much stronger than any currently known.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org