About: http://webisa.webdatacommons.org/334309655

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	Valley networks suggest that rivers once flowed on Mars If water was largely responsible for these features, however, it has long since disappeared: most of the evidence is more than 3800 million years old.
http://www.w3.org/ns/prov#wasQuotedFrom	esa.int