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Term 1: Term 2:

(=>
    (and
        (electricityImportInPeriod ?AREA ?AMOUNT ?PERIOD)
        (or
            (subclass ?PERIOD Year)
            (subclass ?PERIOD
                (FiscalYearFn ?AREA))))
    (exists (?YEAR)
        (and
            (instance ?YEAR ?PERIOD)
            (holdsDuring ?YEAR
                (annualElectricityImport ?AREA ?AMOUNT)))))
Economy.kif 2213-2222
(=>
    (and
        (holdsDuring ?YEAR
            (annualElectricityImport ?AREA ?AMOUNT))
        (instance ?YEAR ?PERIOD)
        (or
            (subclass ?PERIOD Year)
            (subclass ?PERIOD
                (FiscalYearFn ?AREA))))
    (electricityImportInPeriod ?AREA ?AMOUNT ?PERIOD))
Economy.kif 2224-2231


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