This looks like a good way to explore how we could start using AI at our organization. Say we have a PDF of an instruction manual and we'd like to make a workflow that lets us use Ask Relevance. There doesn't seem to be a way to vectorize the content of a PDF. The option isn't presented in the drop down menu. It seems to only offer CSV-related processing, although I selected a PDF as the data type for upload. Am I using it wrong?