Sigma KB Term Intersection

(=>
    (attribute ?H ArtCritic)
    (hasPurpose ?H
        (exists (?AW ?T ?CLASS)
            (and
                (instance ?AW ArtWork)
                (overlapsTemporally
                    (WhenFn ?AW)
                    (WhenFn ?H))
                (instance ?T ?CLASS)
                (subclass ?CLASS Article)
                (authors ?H ?CLASS)
                (refers ?T ?AW)))))

Mid-level-ontology.kif 21089-21101

If art critic is an attribute of an object,
then the object has the purpose there exist an entity, another entity and a third entity such that the entity is an instance of art work and the time of existence of the object overlaps the time of existence of the entity and the other entity is an instance of the third entity and the third entity is a subclass of article and the object is the author of the third entity and the other entity includes a reference to the entity

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