| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8831-8831 | Detergent is a subclass of surfactant |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8832-8832 | Detergent is a subclass of mixture |
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