https://n8n.io/workflows/2165-chat-with-pdf-docs-using-ai-quoting-sources/
https://n8n.io/workflows/2090-chat-with-a-database-using-ai/
https://n8n.io/workflows/2082-use-any-langchain-module-in-n8n-with-the-langchain-code-node/ (youtube)
https://n8n.io/workflows/1951-scrape-and-summarize-webpages-with-ai/
https://n8n.io/workflows/2006-ai-agent-that-can-scrape-webpages/
https://n8n.io/workflows/2092-convert-text-to-speech-with-openai/
https://n8n.io/workflows/1960-ask-questions-about-a-pdf-using-ai/
https://n8n.io/workflows/1959-ai-chatbot-that-can-search-the-web/
https://n8n.io/workflows/2091-gpt-4-website-information-retrieval-based-on-urls/