langchain/document_loaders/trello.py/TrelloLoader/_card_to_doc
class TrelloLoader:    def _card_to_doc(self, card: Card, list_dict: dict) -> Document:
        from bs4 import BeautifulSoup  # type: ignore

        text_content = ""
        if self.include_card_name:
            text_content = card.name + "\n"
        if card.description.strip():
            text_content += BeautifulSoup(card.description, "lxml").get_text()
        if self.include_checklist:
            # Get all the checklist items on the card
            for checklist in card.checklists:
                if checklist.items:
                    items = [
                        f"{item['name']}:{item['state']}" for item in checklist.items
                    ]
                    text_content += f"\n{checklist.name}\n" + "\n".join(items)

        if self.include_comments:
            # Get all the comments on the card
            comments = [
                BeautifulSoup(comment["data"]["text"], "lxml").get_text()
                for comment in card.comments
            ]
            text_content += "Comments:" + "\n".join(comments)

        # Default metadata fields
        metadata = {
            "title": card.name,
            "id": card.id,
            "url": card.url,
        }

        # Extra metadata fields. Card object is not subscriptable.
        if "labels" in self.extra_metadata:
            metadata["labels"] = [label.name for label in card.labels]
        if "list" in self.extra_metadata:
            if card.list_id in list_dict:
                metadata["list"] = list_dict[card.list_id]
        if "closed" in self.extra_metadata:
            metadata["closed"] = card.closed
        if "due_date" in self.extra_metadata:
            metadata["due_date"] = card.due_date

        return Document(page_content=text_content, metadata=metadata)