langchain/document_loaders/url.py/UnstructuredURLLoader/__is_headers_available_for_html
class UnstructuredURLLoader:    def __is_headers_available_for_html(self) -> bool:
        _unstructured_version = self.__version.split("-")[0]
        unstructured_version = tuple([int(x) for x in _unstructured_version.split(".")])

        return unstructured_version >= (0, 5, 7)