Assertion: iron's use | /r/HasProperty | heated by natural gas
Facets:
value: as with carbide lamps
type: MANNER
Source sentences:
text: In the late nineteenth and early twentieth centuries, there were many irons in use that were heated by fuels such as kerosene, ethanol, whale oil, natural gas, carbide gas (acetylene, as with carbide lamps), or even gasoline.