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Term 1: Term 2:

(=>
    (and
        (birthdate ?A ?DAY)
        (instance ?DAY
            (DayFn ?D
                (MonthFn ?M
                    (YearFn ?Y)))))
    (exists (?CLASS ?FUTURE)
        (and
            (birthday ?A ?CLASS)
            (subclass ?CLASS Day)
            (instance ?FUTURE Integer)
            (equal ?CLASS
                (DayFn ?D
                    (MonthFn ?M
                        (YearFn ?FUTURE))))
            (greaterThan ?FUTURE ?Y))))		 Mid-level-ontology.kif 24293-24303
(=>
    (and
        (commemoratesDate ?HOLIDAY
            (DayFn ?DAY
                (MonthFn ?MONTH
                    (YearFn ?YEAR))))
        (instance ?DATE ?HOLIDAY)
        (subclass ?HOLIDAY FixedHoliday)
        (lessThanOrEqualTo ?YEAR ?LATER-YEAR))
    (instance ?DATE
        (DayFn ?DAY
            (MonthFn ?MONTH
                (YearFn ?LATER-YEAR)))))		 Government.kif 583-589
(=>
    (and
        (instance ?WED Wedding)
        (date ?WED ?DAY)
        (instance ?DAY
            (DayFn ?D
                (MonthFn ?M
                    (YearFn ?Y)))))
    (exists (?CLASS ?FUTURE)
        (and
            (weddingAnniversary ?WED ?CLASS)
            (subclass ?CLASS Day)
            (instance ?FUTURE Integer)
            (equal ?CLASS
                (DayFn ?D
                    (MonthFn ?M
                        (YearFn ?FUTURE))))
            (greaterThan ?FUTURE ?Y))))		 Mid-level-ontology.kif 24252-24263


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