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Term 1: Term 2:

(=>
    (instance ?BERG Iceberg)
    (exists (?SHEET)
        (and
            (subclass ?SHEET Glacier)
            (holdsDuring
                (ImmediatePastFn
                    (WhenFn ?BERG))
                (material ?SHEET ?BERG)))))
Geography.kif 4732-4740
(subclass Iceberg Ice) Geography.kif 4722-4722 Iceberg est une sous-classe de Ice
(subclass Iceberg SelfConnectedObject) Geography.kif 4723-4723 Iceberg est une sous-classe de objet en une partie


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