Explore the creation of a powerful Question Answering tool by combining Langchain, Neo4J, and OpenAI models in this 20-minute video tutorial. Learn how to leverage these technologies to build an advanced QA system for data science and machine learning applications. Discover the step-by-step process of integrating Langchain's natural language processing capabilities with Neo4J's graph database and OpenAI's language models. Access the accompanying Jupyter notebook on GitHub for hands-on practice and deeper understanding. Gain insights into the potential of graph databases in natural language querying through an additional resource linking GraphDB and Langchain.