| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 1729-1729 | Copper ore is an industry product type of copper ore mining |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 1725-1725 | Copper ore mining is a subattribute of copper industry |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 1732-1732 | Copper ore mining is a subattribute of copper ore and nickel ore mining |
| appearance as argument number 2 |
|
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| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 17268-17268 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 17267-17267 | |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 17266-17266 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners