| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6870-6870 | Farming practices 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 23302-23302 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 23301-23301 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 23300-23300 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners