About: http://webisa.webdatacommons.org/446337561

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	Valles Marineris is the largest canyon in the solar system, stretching 4,000 kilometers across the planet???s surface.
http://www.w3.org/ns/prov#wasQuotedFrom	planetsforkids.org