About: http://webisa.webdatacommons.org/181566047

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	It occurs naturally in the environment as silicates, oxides, and hydroxides, combined with other elements, such as sodium and fluoride, and as complexes with organic matter.
http://www.w3.org/ns/prov#wasQuotedFrom	well-water-test-kits.com