| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 11091-11091 | Alveolus is a subclass of body vessel |
| No TPTP formula. May not be expressible in strict first order. | Mid-level-ontology.kif 11092-11092 | Alveolus is a subclass of animal anatomical structure |
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