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Term 1: Term 2:

(=>
    (instance ?CF CharcoalFilter)
    (exists (?C)
        (and
            (subclass ?C Charcoal)
            (material ?C ?CF))))
Cars.kif 1694-1699
(subclass Charcoal Fuel) Cars.kif 1676-1676 Charcoal ist eine teilkategorie von Fuel


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