| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6893-6893 | 农业扩张问题 是 环境问题 的 instance |
| appearance as argument number 2 |
|
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 5946-5946 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 5945-5945 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 5944-5944 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners