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No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 13038-13038 Laughing is a subclass of vocalizing
No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 13039-13039 Laughing is a subclass of facial expression
No TPTP formula. May not be expressible in strict first order. emotion.kif 1624-1624 Laughing is a subclass of emotional behavioral process


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