The speaker is talking about how Pantic might be all you need to build with language models, specifically in the context of structured prompting which is the idea of using objects to define what you want back out from a language model.
The concept described is a question-answer pair that involves extracting quotes from a text and validating their existence in the original document. The validator checks if the quote exists in the text chunk and only shows facts that have at least one substring quote from the original document.