| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 2305-2305 | Heating device is a subclass of device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 2317-2317 | Oven is a subclass of heating device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 2330-2330 | Stove is a subclass of heating device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25177-25177 | Iron is a subclass of heating device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 25660-25660 | Water heater is a subclass of heating device |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 26839-26839 | Room heater is a subclass of heating device |
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