| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6876-6876 | Coastal degradation is an instance of environmental issue |
| appearance as argument number 2 |
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|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15366-15366 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15365-15365 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15364-15364 |
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Sigma web home Suggested Upper Merged Ontology (SUMO) web home
Sigma version 3.0 is open source software produced by Articulate Software and its partners