| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 9338-9338 | Depressant is a subclass of biologically active substance |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 8638-8638 | Ethanol is a subclass of depressant |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 9347-9347 | Opium is a subclass of depressant |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 10906-10906 | Alcoholic beverage is a subclass of depressant |
| No TPTP formula. May not be expressible in strict first order. | Medicine.kif 3867-3867 | Benzodiazepine is a subclass of depressant |
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