PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This is the hardest part and may require the help of a plumbing professional to ensure safety and to make sure you have the correct gas pressure.Once the gas and thermostat are connected to the heater, you are ready to turn up the heat!The cost to operate this heater depends on a lot of factors such as your climate, building insulation, and the temperature you wish to achieve.
http://www.w3.org/ns/prov#wasQuotedFrom
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