About: http://webisa.webdatacommons.org/179582075

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	Furthermore, ???substantially free of chemical precursors or other chemicals??? would include oxidation byproducts.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com