About: http://webisa.webdatacommons.org/298196156

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	He theorized they were built and used by Martians to channel water from the polar caps to the desert and other arid regions.
http://www.w3.org/ns/prov#wasQuotedFrom	scpr.org