PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This acid run-off dissolves heavy metals such as copper, lead and mercury into ground and surface water.There are mine management methods that can minimise the problem of AMD, and effective mine design can keep water away from acid generating materials and help prevent AMD occurring.
http://www.w3.org/ns/prov#wasQuotedFrom
  • worldcoal.org