langchain/document_loaders/gutenberg.py/GutenbergLoader/load
class GutenbergLoader:    def load(self) -> List[Document]:
        """Load file."""
        from urllib.request import urlopen

        elements = urlopen(self.file_path)
        text = "\n\n".join([str(el.decode("utf-8-sig")) for el in elements])
        metadata = {"source": self.file_path}
        return [Document(page_content=text, metadata=metadata)]