| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6878-6878 | Coastal marine pollution issue is an instance of environmental issue |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15378-15378 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15377-15377 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 15376-15376 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners