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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_review_sh(self, revision, item):
 """ Add sorting hat enrichment fields for the author of the revision """


        identity = self.get_sh_identity(revision)
        update = parser.parse(item[self.get_field_date()])
        erevision = self.get_item_sh_fields(identity, update)

        return erevision