(subclass LiquefiedPetroleumGas FossilFuel) | Mid-level-ontology.kif 1705-1705 | LiquefiedPetroleumGas は FossilFuel の subclass では %n |
(subclass LiquefiedPetroleumGas RefinedPetroleumProduct) | Economy.kif 5933-5933 | LiquefiedPetroleumGas は RefinedPetroleumProduct の subclass では %n |