| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Transportation.kif 2450-2450 | Hopper dredger is a subclass of dredger |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 28551-28551 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 28550-28550 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 28549-28549 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners