Learn how to implement Retrieval-Augmented Generation (RAG) for extracting information from PDF documents using LlamaIndex and OpenAI GPT-4 in this 18-minute technical tutorial. Follow along with hands-on demonstrations and practical examples that showcase the integration of these powerful tools for efficient document processing and information retrieval. Access the complete implementation details through the provided Jupyter notebook, which contains step-by-step code examples and explanations for building a robust RAG system focused on PDF data extraction.