| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | naics.kif 1236-1238 | |
| No TPTP formula. May not be expressible in strict first order. | naics.kif 1234-1234 | Electrical contractors is a subattribute of special trade contractors |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21480-21480 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21479-21479 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 21478-21478 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners