| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Weather.kif 1243-1243 | Strong wind is a subclass of wind |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 55662-55662 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 55661-55661 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 55660-55660 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners