In this hands-on masterclass, we show how to do this with examples from RelationalAI’s Rel language. We also preview several other interesting tasks that use MLMs, such as semantic search and automatic labeling of features with concepts from an ontology. This combination of the formal and informal is the future of AI. Jupyter Python notebooks will be made available ahead of the class showing how to do (a) through (d) above with OpenAI’s GPT3.5/ChatGPT models. Participants wishing to run the code during class will need their own accounts on OpenAI. Examples will be demonstrated in real use cases.