| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6833-6833 | 过度放牧问题 是 环境问题 的 instance |
| appearance as argument number 2 |
|
|
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43758-43758 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43757-43757 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 43756-43756 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners