PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A mix of water, proppants (matter such as sand) and chemicals (such as benzene and formaldehyde) is then pumped into the bore hole to keep the fracture open and ease the gas flow for extraction
http://www.w3.org/ns/prov#wasQuotedFrom
  • greenerideal.com