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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 handle_annotations_url(self, line: str, position: int, tokens: ParseResults) -> ParseResults: """Handle statements like ``DEFINE ANNOTATION X AS URL "Y"``. :raises: RedefinedAnnotationError """

        keyword = tokens['name']
        self.raise_for_redefined_annotation(line, position, keyword)

        url = tokens['url']
        self.annotation_url_dict[keyword] = url

        if self.skip_validation:
            return tokens

        self.annotation_to_term[keyword] = self.manager.get_annotation_entry_names(url)

        return tokens