| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Languages.kif 1273-1278 | |
| No TPTP formula. May not be expressible in strict first order. | Languages.kif 1272-1272 | Urubu kaapor sign language is an instance of deaf sign language |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 60752-60752 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 60751-60751 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 60750-60750 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners