May be a silly question, but I am just getting into AI. I sent some tests prompts through on some data and it correctly returned a message along the lines of 'I don't have that information', when asked about something not in the data set (currently just using OpenAI). Is it possible to use the custom data in conjunction with the LLM data? Or does it have to be an all or nothing due the model training? I ask, because I feel that the LLM has information that would be supplemental to my data set and it would be nice to mesh the two.