About: http://webisa.webdatacommons.org/109227551

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	In one feature, a proppant may include any or all of plastic, resin, composite, ceramic, metal, sand or other natural treated or untreated granular materials such as wood/bark, shells or nut shells.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com