Assertion: natural gas's propane | /r/HasProperty | hydrocarbon
Facets:
Source sentences:
text: Propane is a fossil fuel, a hydrocarbon and over 95% of it used in the US is produced in North America.
text: Propane is a hydrocarbon fuel and is a member of the natural gas family.
text: Propane (a hydrocarbon gas liquid) is used in cars, buses, and trucks.