| appearance as argument number 1 |
|
| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6875-6875 | 子屬性 碳氫排放問題 and 空氣污染問題 |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 29025-29025 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 29024-29024 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 29023-29023 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners