About: http://webisa.webdatacommons.org/447472246

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	But our sewage also contains something you might not expect: millions of dollars worth of copper, silver, gold, platinum and other valuable metals.
http://www.w3.org/ns/prov#wasQuotedFrom	thehigherlearning.com