PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???Natural gas is a commodity, driven by supply and demand in the market,??? said Welch. ???The good news is that lower energy costs can assist with economic growth, lowering costs for businesses and consumers who use natural gas to heat their homes and operate their businesses.
http://www.w3.org/ns/prov#wasQuotedFrom
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