About: http://webisa.webdatacommons.org/34668000

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	The resulting valleys require details to prevent back-up of water, especially in cold climates prone to ice and snow.
http://www.w3.org/ns/prov#wasQuotedFrom	copper.org