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Term 1: Term 2:

(=>
    (and
        (instance ?SKI SnowSki)
        (material ?MAT ?SKI))
    (or
        (subclass ?MAT Metal)
        (subclass ?MAT Wood)
        (subclass ?MAT Plastic)))		 Sports.kif 1041-1048
(subclass Wood Tissue) Mid-level-ontology.kif 9188-9188
(subclass Wood PlantSubstance) Mid-level-ontology.kif 9189-9189


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