| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8721-8721 | 子類 化學酸 and CompoundSubstance |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 2471-2471 | 子類 化學酸 and Substance |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8695-8695 | 子類 氨基酸 and 化學酸 |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 2479-2479 | 子類 SulfuricAcid and 化學酸 |
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