(subclass PlantProduct Product) | Economy.kif 5186-5186 | PlantProduct 是 产品 的 subclass |
(subclass Sugar PlantProduct) | Economy.kif 4157-4157 | 糖 是 PlantProduct 的 subclass |
(subclass Malt PlantProduct) | Economy.kif 4160-4160 | Malt 是 PlantProduct 的 subclass |