| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8720-8720 | 子類 化學酸 and CompoundSubstance |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 2477-2477 | 子類 化學酸 and Substance |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8694-8694 | 子類 氨基酸 and 化學酸 |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 2485-2485 | 子類 SulfuricAcid and 化學酸 |
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