About: http://webisa.webdatacommons.org/280797495

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 constituents of fly ash are silica, alumina, iron oxide, titanium dioxide, calcium and magnesium oxide, and other trace elements.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com