PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is estimated that operation and maintenance costs could account for up to 30% of the energy cost, and manufacturers recently indicated that the cost of operation and maintenance is around ??30,000 per turbine per year in the UK. The cost of offshore servicing is exaggerated by the cost of equipment, particularly vessels, as the price is driven up by competition from the oil and gas industry.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechies.com