The quality of responses from GPT or other large language models is highly dependent on the quality of messages you send it.In this code-along, you'll learn how to perform sentiment analysis with GPT and LangChain, learn about MRKL prompts used to help LLMs reason, and build a simple AI agent. You'll also learn how to use prompt templates and parse the output from prompts, as well as filter bad unsavory content with the moderation API.