| appearance as argument number 1 |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5314-5314 | |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5313-5313 | Birch wood is a subclass of hardwood |
| appearance as argument number 2 |
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| No TPTP formula. May not be expressible in strict first order. | Geography.kif 6490-6490 | Birch tree is internally related to Birch wood |
| No TPTP formula. May not be expressible in strict first order. | domainEnglishFormat.kif 64540-64540 |
| antecedent |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5316-5321 |
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