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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 geo_context_from_ref(self, ref):
 """Return a ref context object given a location reference entry."""

        value = ref.get('value')
        if value:
            # Here we get the RefContext from the stashed geoloc dictionary
            rc = self.doc.geolocs.get(value['@id'])
            return rc
        return None