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Term 1: Term 2:

(subclass FossilFuel Fuel) Mid-level-ontology.kif 1680-1680 Fossil fuel is a subclass of fuel
(subclass FossilFuel PetroleumProduct) Mid-level-ontology.kif 1681-1681 Fossil fuel is a subclass of petroleum product
(subclass LiquefiedPetroleumGas FossilFuel) Mid-level-ontology.kif 1698-1698 Liquefied petroleum gas is a subclass of fossil fuel
(subclass Gasoline FossilFuel) Mid-level-ontology.kif 1702-1702 Gasoline is a subclass of fossil fuel
(subclass DieselFuel FossilFuel) Mid-level-ontology.kif 1707-1707 Diesel fuel is a subclass of fossil fuel
(subclass Coal FossilFuel) Geography.kif 2018-2018 Coal is a subclass of fossil fuel


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