About: http://webisa.webdatacommons.org/422962118

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 presumption was that as water struck underground ash deposits, it would pick up traces of arsenic, boron, and other elements that can be dangerous if consumed at high levels.
http://www.w3.org/ns/prov#wasQuotedFrom	wbez.org