About: http://webisa.webdatacommons.org/199867408

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	Some chemicals that may be found in water naturally may be harmful, such as selenium, arsenic, and radon.
http://www.w3.org/ns/prov#wasQuotedFrom	amadorwater.org