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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 6201-6201 | Edible nut is an industry product type of tree nut farming |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 1819-1819 | Wagon is an industry product type of truck trailer manufacturing |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 6197-6197 | Vegetable is an industry product type of vegetable farming |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 6163-6163 | Wheat grain is an industry product type of wheat farming |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 1920-1920 | Zinc ore is an industry product type of zinc ore mining |
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